Quantum Physics

The information that is created, processed and exchanged in a seemingly dematerialized technological world is in fact physically encoded in the electronic or magnetic states of various kinds of materials and nanostructures. In today’s computers, at least several million atoms are still required to store the elementary values, ‘0’ or ‘1’, of every single logical bit of information. However, this poses increasingly detrimental limitations, both in terms of performance and energy efficiency. We must therefore search for alternative storage and processing schemes for our future artificial information processing systems. But while the mode in which information is stored and processed at the material level will, and must, change as the transition to these post-von-Neumann computer architectures is made, the fact remains that all of this must be embedded in physical matter. In other words, new computer architectures require new materials, since this is the only way of providing the new functionalities that are called for. Materials relevant for quantum/neuromorphic information technologies are the specific focus of this effort. Quantum materials offer unprecedented capabilities in terms of artificial information processing, promising order-of-magnitude improvements in performance and efficiency in the long term.

Quantum computing promises unprecedented capabilities for certain computational tasks such as prime factorization and decryption. In addition, quantum computing might have a disruptive impact on fields that range from quantum simulations in chemistry, condensed matter and high-energy physics, to optimization problems, to machine learning (ML). Despite major progresses in the field, quantum computing is today still in its infancy, resembling the status of classical computing in the 1950s. From the current stage, the realization of a universal quantum computer remains a monumental task, representing possibly the biggest scientific and engineering challenge of our time. The basic building block of a quantum computer is the quantum mechanical bit (qubit), which can represent arbitrary quantum superpositions of two basis states. Combining qubits into quantum registers results into a memory space that is exponentially larger than its classical analogue, and that can lead to an exponential speedup for certain tasks. The information encoded in qubits is, however, extremely fragile and can be easily lost in a process named decoherence, which is the major obstacle to the realization of a quantum computer. If the error rate is sufficiently low, errors due to decoherence can be corrected without losing the performance benefit of quantum algorithms, employing so-called quantum error correction schemes.

Publication list


2024
Bosonic excitation spectra of superconducting BiSrCaCuO and YBaCuO extracted from scanning tunneling spectra
Gozlinski, T.; Henn, M.; Wolf, T.; Le Tacon, M.; Schmalian, J.; Wulfhekel, W.
2024. Journal of Physics: Condensed Matter, 36 (17), Art.-Nr.: 175601. doi:10.1088/1361-648X/ad1ca8
Engineering unsteerable quantum states with active feedback
Morales, S.; Gefen, Y.; Gornyi, I.; Zazunov, A.; Egger, R.
2024. Physical Review Research, 6 (1), Art.-Nr.: 013244. doi:10.1103/PhysRevResearch.6.013244
Superconducting nitridized-aluminum thin films
Torras-Coloma, A.; Martínez de Olcoz, L.; Céspedes, E.; Bertoldo, E.; López-Núñez, D.; Paul, S.; Wernsdorfer, W.; Rius, G.; Forn-Díaz, P.
2024. Superconductor Science and Technology, 37 (3), Art.-Nr.: 035017. doi:10.1088/1361-6668/ad20fc
Cyclotron resonance and quantum oscillations of critical Fermi surfaces
Guo, H.; Valentinis, D.; Schmalian, J.; Sachdev, S.; Patel, A. A.
2024. Physical Review B, 109 (7), Art.-Nr.: 075162. doi:10.1103/PhysRevB.109.075162
Synthesis, characterization and magnetic properties of halogenated tetranuclear cubane-like nickel( ii ) complexes
Aryaeifar, M.; Rudbari, H. A.; Moreno-Pineda, E.; Cuevas-Vicario, J. V.; Paul, S.; Schulze, M.; Wernsdorfer, W.; Lloret, F.; Moini, N.; Blacque, O.
2024. New Journal of Chemistry, 48 (8), 3603–3613. doi:10.1039/D3NJ05585J
Nonlocal Electrodynamics in Ultrapure PdCoO
Baker, G.; Branch, T. W.; Bobowski, J. S.; Day, J.; Valentinis, D.; Oudah, M.; McGuinness, P.; Khim, S.; Surówka, P.; Maeno, Y.; Scaffidi, T.; Moessner, R.; Schmalian, J.; Mackenzie, A. P.; Bonn, D. A.
2024. Physical Review X, 14 (1), Art.-Nr.: 011018. doi:10.1103/PhysRevX.14.011018
Matrix effects on the magnetic properties of a molecular spin triangle embedded in a polymeric film
Tesi, L.; Boudalis, A. K.; Drerup, K.; Ruben, M.; van Slageren, J.
2024. Physical Chemistry Chemical Physics. doi:10.1039/d3cp05845j
Insight into ferromagnetic interactions in Cu II –Ln III dimers with a compartmental ligand
Panja, A.; Paul, S.; Moreno-Pineda, E.; Herchel, R.; Jana, N. C.; Brandão, P.; Novitchi, G.; Wernsdorfer, W.
2024. Dalton Transactions, 53 (6), 2501–2511. doi:10.1039/d3dt03557c
Ferrocene Appended Porphyrin‐Based Bipolar Electrode Material for High‐Performance Energy Storage
Chowdhury, S.; Jana, S.; Panguluri, S. P. K.; Wenzel, W.; Klayatskaya, S.; Ruben, M.
2024. ChemSusChem, Art-Nr.: e202301903. doi:10.1002/cssc.202301903
Orientation of Cobalt-Phthalocyanines on Molybdenum Disulfide: Distinguishing between Single Crystals and Small Flakes
Haizmann, P.; Juriatti, E.; Klein, M.; Greulich, K.; Nagel, P.; Merz, M.; Schuppler, S.; Ghiami, A.; Ovsyannikov, R.; Giangrisostomi, E.; Chassé, T.; Scheele, M.; Peisert, H.
2024. The Journal of Physical Chemistry C, 128 (5), 2107–2115. doi:10.1021/acs.jpcc.3c06707
Nano-assembled open quantum dot nanotube devices
Althuon, T.; Cubaynes, T.; Auer, A.; Sürgers, C.; Wernsdorfer, W.
2024. Communications Materials, 5, Article no: 5. doi:10.1038/s43246-023-00439-3
Observation of Josephson harmonics in tunnel junctions
Willsch, D.; Rieger, D.; Winkel, P.; Willsch, M.; Dickel, C.; Krause, J.; Ando, Y.; Lescanne, R.; Leghtas, Z.; Bronn, N. T.; Deb, P.; Lanes, O.; Minev, Z. K.; Dennig, B.; Geisert, S.; Günzler, S.; Ihssen, S.; Paluch, P.; Reisinger, T.; Hanna, R.; Bae, J. H.; Schüffelgen, P.; Grützmacher, D.; Buimaga-Iarinca, L.; Morari, C.; Wernsdorfer, W.; DiVincenzo, D. P.; Michielsen, K.; Catelani, G.; Pop, I. M.
2024. Nature Physics. doi:10.1038/s41567-024-02400-8
Hydrogen crystals reduce dissipation in superconducting resonators
Valenti, F.; Kanagin, A. N.; Angerer, A.; Buimaga-Iarinca, L.; Morari, C.; Schmiedmayer, J.; Pop, I. M.
2024. Physical Review B, 109 (5), Art.-Nr.: 054503. doi:10.1103/PhysRevB.109.054503
Vibrational properties of a mononuclear dysprosium containing singlemolecule magnet
Tummeley, M. A. M.; Hoock, M. H.; Gröpl, K.; Pfleger, R.; Hochdörffer, T.; Hunsicker, T.; Wolny, J. A.; Zhao, J.; Lavina, B.; Hu, M. Y.; Toellner, T.; Alp, E. E.; Kämmerer, H.; Anson, C. E.; Powell, A. K.; Schünemann, V.
2024. Hyperfine Interactions, 245 (1), 18. doi:10.1007/s10751-024-01857-6
It’s not just the size that matters: crystal engineering of lanthanide-based coordination polymers
Hauser, A.; Münzfeld, L.; Uhlmann, C.; Lebedkin, S.; Schlittenhardt, S.; Ruan, T.-T.; Kappes, M. M.; Ruben, M.; Roesky, P. W.
2024. Chemical Science, 15 (4), 1338–1347. doi:10.1039/d3sc03746k
Phase transitions associated with magnetic-field induced topological orbital momenta in a non-collinear antiferromagnet
Deng, S.; Gomonay, O.; Chen, J.; Fischer, G.; He, L.; Wang, C.; Huang, Q.; Shen, F.; Tan, Z.; Zhou, R.; Hu, Z.; Šmejkal, L.; Sinova, J.; Wernsdorfer, W.; Sürgers, C.
2024. Nature Communications, 15 (1), Article no: 822. doi:10.1038/s41467-024-45129-x
A nested spin structure and single molecule magnet behaviour in an FeDy heterometallic cyclic coordination cluster
Peng, Y.; Braun, J.; Schulze, M.; Kaemmerer, H.; Schneider, Y. F.; Anson, C. E.; Wernsdorfer, W.; Powell, A. K.
2024. Dalton Transactions, 53 (3), 894–897. doi:10.1039/D3DT04141G
Mitigating crosstalk errors by randomized compiling: Simulation of the BCS model on a superconducting quantum computer
Perrin, H.; Scoquart, T.; Shnirman, A.; Schmalian, J.; Snizhko, K.
2024. Physical Review Research, 6, Article no: 013142. doi:10.1103/PhysRevResearch.6.013142
π‐Conjugated Metal Free Porphyrin as Organic Cathode for Aluminum Batteries
Chowdhury, S.; Sabi, N.; Rojano, R. C.; Le Breton, N.; Boudalis, A. K.; Klayatskaya, S.; Dsoke, S.; Ruben, M.
2024. Batteries & Supercaps, Art.-Nr.: e202300285. doi:10.1002/batt.202300285
An Effectively Uncoupled Gd₈ Cluster Formed through Fixation of Atmospheric CO₂ Showing Excellent Magnetocaloric Properties
Braun, J.; Seufert, D.; Anson, C. E.; Tang, J.; Powell, A. K.
2024. International Journal of Molecular Sciences, 25 (1), Art.-Nr.: 264. doi:10.3390/ijms25010264
Synthesis, Structural Characterization, and Magnetic Properties of Lanthanide Arsolyl Sandwich Complexes
Schwarz, N.; Krätschmer, F.; Suryadevara, N.; Schlittenhardt, S.; Ruben, M.; Roesky, P. W.
2024. Inorganic Chemistry. doi:10.1021/acs.inorgchem.3c03374
Green’s functions of quasi-one-dimensional layered systems and their application to Josephson junctions
Piasotski, K.; Pletyukhov, M.; Shnirman, A.
2024. Physical Review B, 109 (1), Art.-Nr.: 014201. doi:10.1103/PhysRevB.109.014201
Patterned immobilization of polyoxometalate-loaded mesoporous silica particles via amine-ene Michael additions on alkene functionalized surfaces
Yang, B.; Picchetti, P.; Wang, Y.; Wang, W.; Seeger, C.; Bozov, K.; Malik, S.; Mallach, D.; Schäfer, A. H.; Ibrahim, M.; Hirtz, M.; Powell, A. K.
2024. Scientific Reports, 14 (1), Art.-Nr.: 1249. doi:10.1038/s41598-023-50846-2
Transport properties of 2H-NbSe 2 synthesized by selenization of Nb thin films
Zaitsev, A. G.; Beck, A.; Fuchs, D.; Hott, R.; Schneider, R.
2024. Superconductor Science and Technology, 37 (1), 015020. doi:10.1088/1361-6668/ad1464
2023
Resurgence of superconductivity and the role of dxy hole band in FeSeTe
Morfoot, A. B.; Kim, T. K.; Watson, M. D.; Haghighirad, A. A.; Singh, S. J.; Bultinck, N.; Coldea, A. I.
2023. Communications Physics, 6 (1), Art.-Nr.: 362. doi:10.1038/s42005-023-01481-w
Hot luminescence from single-molecule chromophores electrically and mechanically self-decoupled by tripodal scaffolds
Rai, V.; Balzer, N.; Derenbach, G.; Holzer, C.; Mayor, M.; Wulfhekel, W.; Gerhard, L.; Valášek, M.
2023. Nature Communications, 14 (1), Art.-Nr.: 8253. doi:10.1038/s41467-023-43948-y
High-pressure phase diagram of BaNi₂ As₂: Unconventional charge density waves and structural phase transitions
Lacmann, T.; Haghighirad, A.-A.; Souliou, S.-M.; Merz, M.; Garbarino, G.; Glazyrin, K.; Heid, R.; Le Tacon, M.
2023. Physical Review B, 108 (22), Art.-Nr.: 224115. doi:10.1103/PhysRevB.108.224115
On non-local electrical transport in anisotropic metals
Baker, G.; Valentinis, D.; Mackenzie, A. P.
2023. Low Temperature Physics, 49 (12), 1338 – 1352. doi:10.1063/10.0022360
Thermal conductivity in one-dimensional electronic fluids
Gutman, D. B.; Protopopov, I. V.; Samanta, R.; Mirlin, A. D.
2023. Low Temperature Physics, 49 (12), 1358 – 1375. doi:10.1063/10.0022362
Theory of Free Fermions under Random Projective Measurements
Poboiko, I.; Pöpperl, P.; Gornyi, I. V.; Mirlin, A. D.
2023. Physical Review X, 13 (4), Art.-Nr.: 041046. doi:10.1103/PhysRevX.13.041046
Incommensurate magnetic structure of CrAs at low temperatures and high pressures
Eich, A.; Grzechnik, A.; Su, Y.; Ouladdiaf, B.; Sheptyakov, D.; Wolf, T.; Petricek, V.; Shahed, H.; Friese, K.
2023. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 79 (B), 473–481. doi:10.1107/S205252062300817X
Topological transitions of the generalized Pancharatnam-Berry phase
Ferrer-Garcia, M. F.; Snizhko, K.; D’Errico, A.; Romito, A.; Gefen, Y.; Karimi, E.
2023. Science Advances, 9 (47), Art.-Nr.: eadg6810. doi:10.1126/sciadv.adg6810
Interplay of spin and charge order in the electron-doped cuprates
Riegler, D.; Seufert, J.; Silva Neto, E. H. da; Wölfle, P.; Thomale, R.; Klett, M.
2023. Physical Review B, 108 (19), Art.-Nr.: 195141. doi:10.1103/PhysRevB.108.195141
Andreev and normal reflections in gapped bilayer graphene–superconductor junctions
Ram, P.; Beckmann, D.; Danneau, R.; Belzig, W.
2023. Physical Review B, 108 (18), Article no: 184510. doi:10.1103/PhysRevB.108.184510
Electron phonon coupling and superconductivity in α-MoB₂ as a function of pressure
Carmona-Galván, M.-A.; Heid, R.; De la Peña-Seaman, O.
2023. Physica Scripta, 98 (11), Art.-Nr.: 115975. doi:10.1088/1402-4896/ad03c7
Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2
Shen, X.; Heid, R.; Hott, R.; Haghighirad, A.-A.; Salzmann, B.; dos Reis Cantarino, M.; Monney, C.; Said, A. H.; Frachet, M.; Murphy, B.; Rossnagel, K.; Rosenkranz, S.; Weber, F.
2023. Nature Communications, 14 (1), 7282. doi:10.1038/s41467-023-43094-5
Multiband description of the upper critical field of bulk FeSe
Bristow, M.; Gower, A.; Prentice, J. C. A.; Watson, M. D.; Zajicek, Z.; Blundell, S. J.; Haghighirad, A. A.; McCollam, A.; Coldea, A. I.
2023. Physical Review B, 108 (18), Art.-Nr.: 184507. doi:10.1103/PhysRevB.108.184507
A macroscopic oscillator goes and stays quantum
Metelmann, A.
2023. Nature Physics, 19 (11), 1559–1560. doi:10.1038/s41567-023-02138-9
Giant lattice softening at a Lifshitz transition in Sr₂RuO₄
Noad, H. M. L.; Ishida, K.; Li, Y.-S.; Gati, E.; Stangier, V.; Kikugawa, N.; Sokolov, D. A.; Nicklas, M.; Kim, B.; Mazin, I. I.; Garst, M.; Schmalian, J.; Mackenzie, A. P.; Hicks, C. W.
2023. Science, 382 (6669), 447–450. doi:10.1126/science.adf3348
Adherence of the rotating vortex lattice in the noncentrosymmetric superconductor RuB to the London model
Cameron, A. S.; Tymoshenko, Y. V.; Portnichenko, P. Y.; Sukhanov, A. S.; Ciomaga Hatnean, M.; McK Paul, D.; Balakrishnan, G.; Cubitt, R.; Inosov, D. S.
2023. Journal of Physics: Condensed Matter, 35 (42), Art.-Nr.: 425602. doi:10.1088/1361-648X/ace576
Giant Nonvolatile Electric Field Control of Proximity‐Induced Magnetism in the Spin–Orbit Semimetal SrIrO
Jaiswal, A. K.; Eder, R.; Wang, D.; Wollersen, V.; Tacon, M. L.; Fuchs, D.
2023. Advanced Functional Materials, Art.Nr.: 2308346. doi:10.1002/adfm.202308346
Probing superconducting order in overdoped Ca Y Ba Cu O by neutron diffraction measurements of the vortex lattice
Cameron, A. S.; Campillo, E.; Alshemi, A.; Bartkowiak, M.; Shen, L.; Kawano-Furukawa, H.; Holmes, A. T.; Prokhnenko, O.; Gazizulina, A.; White, J. S.; Cubitt, R.; Steinke, N.-J.; Dewhurst, C. D.; Erb, A.; Forgan, E. M.; Blackburn, E.
2023. Physical Review B, 108 (14), Art.-Nr.: 144511. doi:10.1103/PhysRevB.108.144511
BCS to incoherent superconductivity crossover in the Yukawa-Sachdev-Ye-Kitaev model on a lattice
Valentinis, D.; Inkof, G. A.; Schmalian, J.
2023. Physical Review B, 108 (14), L140501. doi:10.1103/PhysRevB.108.L140501
Dynamic paramagnon-polarons in altermagnets
Steward, C. R. W.; Fernandes, R. M.; Schmalian, J.
2023. Physical Review B, 108 (14), Article no: 144418. doi:10.1103/PhysRevB.108.144418
Development and characterisation of high-resolution microcalorimeter detectors for the ECHo-100k experiment
Mantegazzini, F.; Kovac, N.; Enss, C.; Fleischmann, A.; Griedel, M.; Gastaldo, L.
2023. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1055, Art.-Nr.: 168564. doi:10.1016/j.nima.2023.168564
Hilbert Space in Isotopologue Dy(III) SMM Dimers: Dipole Interaction Limit in [ Dy (tmhd)(tape)] Complexes
Ruan, T.-T.; Moreno-Pineda, E.; Schulze, M.; Schlittenhardt, S.; Brietzke, T.; Holdt, H.-J.; Kuppusamy, S. K.; Wernsdorfer, W.; Ruben, M.
2023. Inorganic Chemistry, 62 (37), 15148–15156. doi:10.1021/acs.inorgchem.3c02246
Neutral cobalt( ii )-bis(benzimidazole)pyridine field-induced single-ion magnets for surface deposition
Juráková, J.; Fellner, O. F.; Schlittenhardt, S.; Vavrečková, Š.; Nemec, I.; Herchel, R.; Čižmár, E.; Santana, V. T.; Orlita, M.; Gentili, D.; Ruani, G.; Cavallini, M.; Neugebauer, P.; Ruben, M.; Šalitroš, I.
2023. Inorganic Chemistry Frontiers, 10 (18), 5406–5419. doi:10.1039/d3qi00931a
Band-resolved Caroli–de Gennes–Matricon states of multiple-flux-quanta vortices in a multiband superconductor
Gozlinski, T.; Li, Q.; Heid, R.; Nemoto, R.; Willa, R.; Yamada, T. K.; Schmalian, J.; Wulfhekel, W.
2023. Science Advances, 9 (36), Art.-Nr.: eadh9163. doi:10.1126/sciadv.adh9163
Density deficit of Earth’s core revealed by a multimegabar primary pressure scale
Ikuta, D.; Ohtani, E.; Fukui, H.; Sakamaki, T.; Heid, R.; Ishikawa, D.; Baron, A. Q. R.
2023. Science Advances, 9 (36), Art.-Nr.: eadh8706. doi:10.1126/sciadv.adh8706
Lattice dynamics and thermal transport of PbTe under high pressure
Cheng, R.; Shen, X.; Klotz, S.; Zeng, Z.; Li, Z.; Ivanov, A.; Xiao, Y.; Zhao, L.-D.; Weber, F.; Chen, Y.
2023. Physical Review B, 108 (10), 104306. doi:10.1103/PhysRevB.108.104306
Thermalization of non-Fermi-liquid electron-phonon systems: Hydrodynamic relaxation of the Yukawa-Sachdev-Ye-Kitaev model
Hosseinabadi, H.; Kelly, S. P.; Schmalian, J.; Marino, J.
2023. Physical Review B, 108 (10), 104319. doi:10.1103/PhysRevB.108.104319
Constraints on the superconducting state of Sr 2 RuO 4 from elastocaloric measurements
Palle, G.; Hicks, C.; Valentí, R.; Hu, Z.; Li, Y.-S.; Rost, A.; Nicklas, M.; Mackenzie, A. P.; Schmalian, J.
2023. Physical Review B, 108 (9), Article no: 094516. doi:10.1103/PhysRevB.108.094516
Generalized surface multifractality in two-dimensional disordered systems
Babkin, S. S.; Karcher, J. F.; Burmistrov, I. S.; Mirlin, A. D.
2023. Physical Review B, 108 (10), Art.-Nr.: 104205. doi:10.1103/PhysRevB.108.104205
Stochastic Formation of Quantum Defects in Carbon Nanotubes
Ma, C.; Schrage, C. A.; Gretz, J.; Akhtar, A.; Sistemich, L.; Schnitzler, L.; Li, H.; Tschulik, K.; Flavel, B. S.; Kruss, S.
2023. ACS Nano, 17 (16), 15989 – 15998. doi:10.1021/acsnano.3c04314
Instability of Magnetic Skyrmion Strings Induced by Longitudinal Spin Currents
Okumura, S.; Kravchuk, V. P.; Garst, M.
2023. Physical Review Letters, 131 (6), Art.-Nr.: 066702. doi:10.1103/PhysRevLett.131.066702
Structures and Properties of a Series of High-Spin [Co II 2 ] Complexes Supported by Ancillary Benzoate, Ortho -Hydroxybenzoate, and Para -Hydroxybenzoate Ligands
Sk, S.; Biswas, S.; Dutta, N.; Das, A.; Suryadevara, N.; Vijaykumar, G.; Bhunia, P.; Ruben, M.; Mandal, S.; Bera, M.
2023. Crystal Growth & Design, 23 (8), 5925–5940. doi:10.1021/acs.cgd.3c00521
Hierarchical Self-Assembly and Conformation of Tb Double-Decker Molecular Magnets: Experiment and Molecular Dynamics
Lawes, P.; Boero, M.; Barhoumi, R.; Klyatskaya, S.; Ruben, M.; Bucher, J.-P.
2023. Nanomaterials, 13 (15), Art.-Nr.: 2232. doi:10.3390/nano13152232
Proposal for detecting the π -shifted Cooper quartet supercurrent
Mélin, R.; Danneau, R.; Winkelmann, C. B.
2023. Physical Review Research, 5 (3), 033124. doi:10.1103/PhysRevResearch.5.033124
Helical spin dynamics in commensurate magnets: A study on brochantite, Cu 4 SO 4 ( OH ) 6
Nikitin, S. E.; Xie, T.; Gazizulina, A.; Ouladdiaf, B.; Velamazán, J. A. R.; Díaz-Ortega, I. F.; Nojiri, H.; Anovitz, L. M.; dos Santos, A. M.; Prokhnenko, O.; Podlesnyak, A.
2023. Physical Review Research, 5 (3), 033111. doi:10.1103/PhysRevResearch.5.033111
Dissipative preparation and stabilization of many-body quantum states in a superconducting qutrit array
Wang, Y.; Snizhko, K.; Romito, A.; Gefen, Y.; Murch, K.
2023. Physical Review A, 108 (1), Art.-Nr.: 013712. doi:10.1103/PhysRevA.108.013712
Fano Interference in Microwave Resonator Measurements
Rieger, D.; Günzler, S.; Spiecker, M.; Nambisan, A.; Wernsdorfer, W.; Pop, I. M.
2023. Physical Review Applied, 20 (1), Art.-Nr.: 014059. doi:10.1103/PhysRevApplied.20.014059
Ergodicity-to-localization transition on random regular graphs with large connectivity and in many-body quantum dots
Herre, J.-N.; Karcher, J. F.; Tikhonov, K. S.; Mirlin, A. D.
2023. Physical Review B, 108 (1), Art.-Nr.: 014203. doi:10.1103/PhysRevB.108.014203
Electronic structure of (=Y, La, Bi): Synthesis, characterization, core-level spectroscopies, high-pressure application, and ab initio calculation
Kato, Y.; Huang, M.-J.; Kasebayashi, K.; Kawakami, T.; Yamaguchi, T.; Buck, J.; Wang, R.-P.; Kalläne, M.; Rossnagel, K.; Nagel, P.; Schuppler, S.; Takahashi, Y.; Odake, T.; Kawaguchi, S.; Yamada, I.; Hariki, A.
2023. Physical Review Materials, 7 (7), Art.-Nr.: 073401. doi:10.1103/PhysRevMaterials.7.073401
Network of chiral one-dimensional channels and localized states emerging in a moiré system
Park, J.; Gresista, L.; Trebst, S.; Rosch, A.; Park, J.
2023. 2D Materials, 10 (3), Art.-Nr.: 035033. doi:10.1088/2053-1583/acdd82
High-sensitivity specific heat study of the low-temperature–high-field corner of the phase diagram of FeSe
Klein, T.; Demuer, A.; Seyfarth, G.; Cercellier, H.; Doussoulin, L.; Toulemonde, P.; Haghighirad A.A.; Hardy, F.; Marcenat, C.
2023. Physical Review B, 107 (22), Art.-Nr.: 224506. doi:10.1103/PhysRevB.107.224506
Observation of Narrow Optical Homogeneous Linewidth and Long Nuclear Spin Lifetimes in a Prototypical [Eu(trensal)] Complex
Kuppusamy, S. K.; Vasilenko, E.; Li, W.; Hessenauer, J.; Ioannou, C.; Fuhr, O.; Hunger, D.; Ruben, M.
2023. The Journal of Physical Chemistry C, 127 (22), 10670–10679. doi:10.1021/acs.jpcc.3c02903
Thermalization of Nuclear Spins in Lanthanide Molecular Magnets
Taran, G.; Bonet, E.; Moreno-Pineda, E.; Ruben, M.; Wernsdorfer, W.
2023. Inorganic Chemistry, 62 (22), 8598–8604. doi:10.1021/acs.inorgchem.3c00530
Evolution of many-body systems under ancilla quantum measurements
Doggen, E. V. H.; Gefen, Y.; Gornyi, I. V.; Mirlin, A. D.; Polyakov, D. G.
2023. Physical Review B, 107 (21), Article no: 214203. doi:10.1103/PhysRevB.107.214203
Measurement-Driven Navigation in Many-Body Hilbert Space: Active-Decision Steering
Herasymenko, Y.; Gornyi, I.; Gefen, Y.
2023. PRX Quantum, 4 (2), Art.-Nr.: 020347. doi:10.1103/PRXQuantum.4.020347
High-Purity Entanglement of Hot Propagating Modes Using Nonreciprocity
Orr, L.; Khan, S. A.; Buchholz, N.; Kotler, S.; Metelmann, A.
2023. PRX Quantum, 4 (2), Art.-Nr.: 020344. doi:10.1103/PRXQuantum.4.020344
Steps towards current metrology
Rastelli, G.; Pop, I. M.
2023. Nature Physics, 19 (6), 771–772. doi:10.1038/s41567-023-01976-x
Transport signatures of fractional quantum Hall binding transitions
Spånslätt, C.; Stern, A.; Mirlin, A. D.
2023. Physical Review B, 107 (24), Art.-Nr.: 245405. doi:10.1103/PhysRevB.107.245405
A Unifying Perspective of Common Motifs That Occur across Disparate Classes of Materials Harboring Displacive Phase Transitions
Grünebohm, A.; Hütten, A.; Böhmer, A. E.; Frenzel, J.; Eremin, I.; Drautz, R.; Ennen, I.; Caron, L.; Kuschel, T.; Lechermann, F.; Anselmetti, D.; Dahm, T.; Weber, F.; Rossnagel, K.; Schierning, G.
2023. Advanced Energy Materials, Art.-Nr.: 2300754. doi:10.1002/aenm.202300754
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A dinuclear dysprosium Schiff base complex showing slow magnetic relaxation in the absence of an external magnetic field
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2022. New Journal of Chemistry, 46 (35), 16702–16707. doi:10.1039/d2nj02591d
Exploration of Vanadium(IV)-Based Single-Ion Magnet Properties in Diphosphonate-Supported Mixed-Valent Polyoxovanadates
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2022. Crystal Growth & Design, 22 (9), 5666–5679. doi:10.1021/acs.cgd.2c00754
Influence of the Pd–Si Ratio on the Valence Transition in EuPdSi Single Crystals
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Investigating field-induced magnetic order in Han purple by neutron scattering up to 25.9 T
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Interface Properties of Perfluorinated Iron Phthalocyanine on Au(111) and Ag(111): The Influence of Iron and the Macrocycle
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Quantum critical fluctuations in an Fe-based superconductor
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Light Control over Chirality Selective Functionalization of Substrate Supported Carbon Nanotubes
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Observing a topological transition in weak-measurement-induced geometric phases
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Analyzing the Local Electronic Structure of CoO Using 2p3d Resonant Inelastic X-ray Scattering
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Tubular glassy carbon microneedles with fullerene-like tips for biomedical applications
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Spin and valley degrees of freedom in a bilayer graphene quantum point contact: Zeeman splitting and interaction effects
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Generalized quantum measurements with matrix product states: Entanglement phase transition and clusterization
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Tunable Multi-Bit Nonvolatile Memory Based on Ferroelectric Field-Effect Transistors
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Absolute Quantification of sp Defects in Semiconducting Single-Wall Carbon Nanotubes by Raman Spectroscopy
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Spin-Crossover in Supramolecular Iron(II)–2,6-bis(1 H -Pyrazol-1-yl)pyridine Complexes: Toward Spin-State Switchable Single-Molecule Junctions
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Electron–phonon coupling and superconductivity in a 2D Tl–Pb compound on Si(111)
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Direct Observation of Strong Anomalous Hall Effect and Proximity-induced Ferromagnetic State in SrIrO₃
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Many-body localization in a tilted potential in two dimensions
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Combined inelastic neutron scattering and ab initio lattice dynamics study of FeSi
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Magnetic domain walls of the van der Waals material Fe3GeTe2
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Ultra-narrow optical linewidths in rare-earth molecular crystals
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Cavity-QED simulation of a quantum metamaterial with tunable disorder
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Phase-dependent microwave response of a graphene Josephson junction
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Breakdown of the Wiedemann-Franz law at the Lifshitz point of strained Sr 2 RuO 4
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Emergent Continuous Symmetry in Anisotropic Flexible Two-Dimensional Materials
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Visualization of structural changes and degradation of porphyrin-based battery electrodes
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Clustered piperidinium-functionalized poly(terphenylene) anion exchange membranes with well-developed conductive nanochannels
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Quantitative Determination of the Complex Polarizability of Individual Nanoparticles by Scanning Cavity Microscopy
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Structural Insights into Hysteretic Spin‐Crossover in a Set of Iron(II)‐2,6‐bis(1 H ‐Pyrazol‐1‐yl)Pyridine) Complexes
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Optimized steering: Quantum state engineering and exceptional points
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Topological Josephson Junction in Transverse Magnetic Field
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UV-Light-Tunable p-/n-Type Chemiresistive Gas Sensors Based on Quasi-1D TiS3 Nanoribbons: Detection of Isopropanol at ppm Concentrations
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Intersystem Crossing Rates in Photoexcited Rose Bengal: Solvation versus Isolation
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Coexistence of localization and transport in many-body two-dimensional Aubry-André models
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Spin-orbital Yu-Shiba-Rusinov states in single Kondo molecular magnet
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Nodal and Nematic Superconducting Phases in NbSe Monolayers from Competing Superconducting Channels
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Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS 2
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Unraveling the State of Charge-Dependent Electronic and Ionic Structure–Property Relationships in NCM622 Cells by Multiscale Characterization
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History-dependent domain and skyrmion formation in 2D van der Waals magnet Fe₃GeTe₂
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Competition between spin ordering and superconductivity near the pseudogap boundary in La Sr CuO: Insights from NMR
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Investigations on the Spin States of Two Mononuclear Iron(II) Complexes Based on N-Donor Tridentate Schiff Base Ligands Derived from Pyridine-2,6-Dicarboxaldehyde
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Triangulo -{Er$_{3}} complex showing field supported slow magnetic relaxation
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Determination of topological edge quantum numbers of fractional quantum Hall phases by thermal conductance measurements
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Field-Induced Single Molecule Magnetic Behavior of Mononuclear Cobalt(II) Schiff Base Complex Derived from 5-Bromo Vanillin
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Electroluminescence from Single-Walled Carbon Nanotubes with Quantum Defects
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Microscopic quantum point contact formation as the electromigration mechanism in granular superconductor nanowires
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Experimental and theoretical study of field-dependent spin splitting at ferromagnetic insulator–superconductor interfaces
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A topological flux trap: Majorana bound states at screw dislocations
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A Tetranuclear Dysprosium Schiff Base Complex Showing Slow Relaxation of Magnetization
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Keeping dysprosium in line: Trinuclear heterometallic M Dy complexes with M=Cd, Co and Cu
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Tailoring Spectrally Flat Infrared Photodetection with Thickness-Controlled Nanocrystalline Graphite
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Operating in a deep underground facility improves the locking of gradiometric fluxonium qubits at the sweet spots
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High-Performance Luminescence Thermometer with Field-Induced Slow Magnetic Relaxation Based on a Heterometallic Cyanido-Bridged 3d-4f Complex
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Selection of the silicon sensor thickness for the Phase-2 upgrade of the CMS Outer Tracker
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2021. Journal of Instrumentation, 16 (11), Article no: P11028. doi:10.1088/1748-0221/16/11/P11028
Thermodynamic signatures of short-range magnetic correlations in UTe2
Willa, K.; Hardy, F.; Aoki, D.; Li, D.; Wiecki, P.; Lapertot, G.; Meingast, C.
2021. Physical Review B, 104 (20), Art.Nr. 205107. doi:10.1103/PhysRevB.104.205107
Breaking Symmetry Relaxes Structural and Magnetic Restraints, Suppressing QTM in Enantiopure Butterfly FeDy SMMs**
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2021. Chemistry - a European journal, 27 (61), 15103–15109. doi:10.1002/chem.202103360
Tunable Anderson localization of dark states
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2021. Physical Review B, 104 (17), Art.-Nr.: 174202. doi:10.1103/PhysRevB.104.174202
Two birds with one stone: dual grain-boundary and interface passivation enables >22% efficient inverted methylammonium-free perovskite solar cells
Gharibzadeh, S.; Fassl, P.; Hossain, I. M.; Rohrbeck, P.; Frericks, M.; Schmidt, M.; Duong, T.; Khan, M. R.; Abzieher, T.; Nejand, B. A.; Schackmar, F.; Almora, O.; Feeney, T.; Singh, R.; Fuchs, D.; Lemmer, U.; Hofmann, J. P.; Weber, S. A. L.; Paetzold, U. W.
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Sensing Molecules with Metal–Organic Framework Functionalized Graphene Transistors
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Microwave response of a chiral Majorana interferometer
Shapiro, D. S.; Mirlin, A. D.; Shnirman, A.
2021. Physical Review B, 104 (3), Art.-Nr.: 035434. doi:10.1103/PhysRevB.104.035434
Chiral Resolution of Spin-Crossover Active Iron(II) [2x2] Grid Complexes
Suryadevara, N.; Pausch, A.; Moreno-Pineda, E.; Mizuno, A.; Bürck, J.; Baksi, A.; Hochdörffer, T.; Šalitroš, I.; Ulrich, A. S.; Kappes, M. M.; Schünemann, V.; Klopper, W.; Ruben, M.
2021. Chemistry - A European Journal, 27 (61), 15172–15180. doi:10.1002/chem.202101432
Synthesis and Surface Behaviour of NDI Chromophores Mounted on a Tripodal Scaffold: Towards Self-Decoupled Chromophores for Single-Molecule Electroluminescence
Balzer, N.; Lukášek, J.; Valášek, M.; Rai, V.; Sun, Q.; Gerhard, L.; Wulfhekel, W.; Mayor, M.
2021. Chemistry - A European Journal, 27 (47), 12144–12155. doi:10.1002/chem.202101264
From Anderson localization on random regular graphs to many-body localization
Tikhonov, K. S.; Mirlin, A. D.
2021. Annals of Physics, 435 (1), Art.Nr. 168525. doi:10.1016/j.aop.2021.168525
Superconducting insulators and localization of Cooper pairs
Arutyunov, K. Y.; Lehtinen, J. S.; Radkevich, A.; Semenov, A. G.; Zaikin, A. D.
2021. Communications Physics, 4 (1), 146. doi:10.1038/s42005-021-00648-7
Anomalous Hydrodynamics in a One-Dimensional Electronic Fluid
Protopopov, I. V.; Samanta, R.; Mirlin, A. D.; Gutman, D. B.
2021. Physical review letters, 126 (25), Art.-Nr.: 256801. doi:10.1103/PhysRevLett.126.256801
Acoustic properties of metallic glasses at low temperatures: Tunneling systems and their dephasing
Meißner, A.; Voigtländer, T.; Meißner, S. M.; Kühn, U.; Schneider, S.; Shnirman, A.; Weiss, G.
2021. Physical Review B, 103 (22), 224209. doi:10.1103/PhysRevB.103.224209
Minimizing the Discrimination Time for Quantum States of an Artificial Atom
Takmakov, I.; Winkel, P.; Foroughi, F.; Planat, L.; Gusenkova, D.; Spiecker, M.; Rieger, D.; Grünhaupt, L.; Ustinov, A. V.; Wernsdorfer, W.; Pop, I. M.; Roch, N.
2021. Physical review applied, 15 (6), Art. Nr.: 064029. doi:10.1103/PhysRevApplied.15.064029
Quantum Nondemolition Dispersive Readout of a Superconducting Artificial Atom Using Large Photon Numbers
Gusenkova, D.; Spiecker, M.; Gebauer, R.; Willsch, M.; Willsch, D.; Valenti, F.; Karcher, N.; Grünhaupt, L.; Takmakov, I.; Winkel, P.; Rieger, D.; Ustinov, A. V.; Roch, N.; Wernsdorfer, W.; Michielsen, K.; Sander, O.; Pop, I. M.
2021. Physical review applied, 15 (6), Art. Nr.: 064030. doi:10.1103/PhysRevApplied.15.064030
Neutron studies of a high spin Fe molecular nanodisc
Pratt, F. L.; Guidi, T.; Manuel, P.; Anson, C. E.; Tang, J.; Blundell, S. J.; Powell, A. K.
2021. Magnetochemistry, 7 (6), 74. doi:10.3390/magnetochemistry7060074
Degradable Fluorene- And Carbazole-Based Copolymers for Selective Extraction of Semiconducting Single-Walled Carbon Nanotubes
Xu, L.; Valášek, M.; Hennrich, F.; Fischer, R.; Kappes, M. M.; Mayor, M.
2021. Macromolecules, 54 (9), 4363–4374. doi:10.1021/acs.macromol.1c00465
Photon Transport in a Bose-Hubbard Chain of Superconducting Artificial Atoms
Fedorov, G. P.; Remizov, S. V.; Shapiro, D. S.; Pogosov, W. V.; Egorova, E.; Tsitsilin, I.; Andronik, M.; Dobronosova, A. A.; Rodionov, I. A.; Astafiev, O. V.; Ustinov, A. V.
2021. Physical Review Letters, 126 (18), Art.-Nr.: 180503. doi:10.1103/PhysRevLett.126.180503
Reducing the impact of radioactivity on quantum circuits in a deep-underground facility
Cardani, L.; Valenti, F.; Casali, N.; Catelani, G.; Charpentier, T.; Clemenza, M.; Colantoni, I.; Cruciani, A.; D’Imperio, G.; Gironi, L.; Grünhaupt, L.; Gusenkova, D.; Henriques, F.; Lagoin, M.; Martinez, M.; Pettinari, G.; Rusconi, C.; Sander, O.; Tomei, C.; Ustinov, A. V.; Weber, M.; Wernsdorfer, W.; Vignati, M.; Pirro, S.; Pop, I. M.
2021. Nature Communications, 12 (1), Art.-Nr.: 2733. doi:10.1038/s41467-021-23032-z
Long-range Josephson effect controlled by temperature gradient and circuit topology
Kalenkov, M. S.; Zaikin, A. D.
2021. European Physical Journal: Special Topics, 230 (4), 813–820. doi:10.1140/epjs/s11734-021-00065-5
Phase-coherent thermoelectricity and nonequilibrium Josephson current in Andreev interferometers
Kalenkov, M. S.; Zaikin, A. D.
2021. Physical Review B, 103 (13), Art.-Nr.: 134501. doi:10.1103/PhysRevB.103.134501
Subgap Kinetic Inductance Detector Sensitive to 85-GHz Radiation
Levy-Bertrand, F.; Benoît, A.; Bourrion, O.; Calvo, M.; Catalano, A.; Goupy, J.; Valenti, F.; Maleeva, N.; Grünhaupt, L.; Pop, I. M.; Monfardini, A.
2021. Physical Review Applied, 15 (4), Art.-Nr.: 044002. doi:10.1103/PhysRevApplied.15.044002
Linkage between scattering rates and superconductivity in doped ferropnictides
Fink, J.; Rienks, E. D. L.; Yao, M.; Kurleto, R.; Bannies, J.; Aswartham, S.; Morozov, I.; Wurmehl, S.; Wolf, T.; Hardy, F.; Meingast, C.; Jeevan, H. S.; Maiwald, J.; Gegenwart, P.; Felser, C.; Büchner, B.
2021. Physical Review B, 103 (15), Art.:-Nr.: 155119. doi:10.1103/PhysRevB.103.155119
Breakdown of charge homogeneity in the two-dimensional Hubbard model: Slave-boson study of magnetic order
Seufert, J.; Riegler, D.; Klett, M.; Thomale, R.; Wölfle, P.
2021. Physical Review B, 103 (16), Art.-Nr.: 165117. doi:10.1103/PhysRevB.103.165117
Optical spin-state polarization in a binuclear europium complex towards molecule-based coherent light-spin interfaces
Kumar, K. S.; Serrano, D.; Nonat, A. M.; Heinrich, B.; Karmazin, L.; Charbonnière, L. J.; Goldner, P.; Ruben, M.
2021. Nature Communications, 12 (1), Art.-Nr.: 2152. doi:10.1038/s41467-021-22383-x
Improved Electrical, Thermal, and Thermoelectric Properties Through Sample‐to‐Sample Fluctuations in Near‐Percolation Threshold Composite Materials
Rösch, A. G.; Giunta, F.; Mallick, M. M.; Franke, L.; Gall, A.; Aghassi-Hagmann, J.; Schmalian, J.; Lemmer, U.
2021. Advanced theory and simulations, 4 (6), Art.-Nr.: 2000284. doi:10.1002/adts.202000284
Erratum to: Principles of carbon nanotube dielectrophoresis
Li, W.; Hennrich, F.; Flavel, B. S.; Dehm, S.; Kappes, M.; Krupke, R.
2021. Nano research, 14, Art.Nr. 2470. doi:10.1007/s12274-021-3378-z
Enantiomeric Separation of Semiconducting Single-Walled Carbon Nanotubes by Acid Cleavable Chiral Polyfluorene
Xu, L.; Valášek, M.; Hennrich, F.; Sedghamiz, E.; Penaloza-Amion, M.; Häussinger, D.; Wenzel, W.; Kappes, M. M.; Mayor, M.
2021. ACS Nano, 15 (3), 4699–4709. doi:10.1021/acsnano.0c09235
Heteroleptic, polynuclear dysprosium()-carbamato complexes throughin situcarbon dioxide capture
Schlittenhardt, S.; Moreno-Pineda, E.; Ruben, M.
2021. Dalton Transactions, 50 (13), 4735–4742. doi:10.1039/d1dt00063b
Microwave resonances of magnetic skyrmions in thin film multilayers
Satywali, B.; Kravchuk, V. P.; Pan, L.; Raju, M.; He, S.; Ma, F.; Petrović, A. P.; Garst, M.; Panagopoulos, C.
2021. Nature Communications, 12 (1), Art.-Nr.: 1909. doi:10.1038/s41467-021-22220-1
Short-Range Nematic Fluctuations in Sr-NaFeAs Superconductors
Wu, S.; Song, Y.; He, Y.; Frano, A.; Yi, M.; Chen, X.; Uchiyama, H.; Alatas, A.; Said, A. H.; Wang, L.; Wolf, T.; Meingast, C.; Birgeneau, R. J.
2021. Physical Review Letters, 126 (10), Art.-Nr.: 107001. doi:10.1103/PhysRevLett.126.107001
Hydrodynamic collective modes in graphene
Narozhny, B. N.; Gornyi, I. V.; Titov, M.
2021. Physical Review B, 103 (11), Art.Nr. 115402. doi:10.1103/PhysRevB.103.115402
Stark many-body localization: Evidence for Hilbert-space shattering
Doggen, E. V. H.; Gornyi, I. V.; Polyakov, D. G.
2021. Physical Review B, 103 (10), Art.-Nr.: L100202. doi:10.1103/PhysRevB.103.L100202
Addressing a lattice of rotatable molecular dipoles with the electric field of an STM tip
Frauhammer, T.; Gerhard, L.; Edelmann, K.; Lindner, M.; Valášek, M.; Mayor, M.; Wulfhekel, W.
2021. Physical Chemistry Chemical Physics, 23 (8), 4874–4881. doi:10.1039/d0cp06146h
Nonreciprocity of spin waves in the conical helix state
Ogawa, N.; Köhler, L.; Garst, M.; Toyoda, S.; Seki, S.; Tokura, Y.
2021. Proceedings of the National Academy of Sciences of the United States of America, 118 (8), e2022927118. doi:10.1073/pnas.2022927118
Ionic liquid gating of single-walled carbon nanotube devices with ultra-short channel length down to 10 nm
Janissek, A.; Lenz, J.; Giudice, F. D.; Gaulke, M.; Pyatkov, F.; Dehm, S.; Hennrich, F.; Wei, L.; Chen, Y.; Fediai, A.; Kappes, M.; Wenzel, W.; Krupke, R.; Weitz, R. T.
2021. Applied Physics Letters, 118 (6), Art.-Nr.: 063101. doi:10.1063/5.0034792
Field-induced oscillation of magnetization blocking barrier in a holmium metallacrown single-molecule magnet
Wu, S.-G.; Ruan, Z.-Y.; Huang, G.-Z.; Zheng, J.-Y.; Vieru, V.; Taran, G.; Wang, J.; Chen, Y.-C.; Liu, J.-L.; Ho, L. T. A.; Chibotaru, L. F.; Wernsdorfer, W.; Chen, X.-M.; Tong, M.-L.
2021. Chem, 7 (4), 982–992. doi:10.1016/j.chempr.2020.12.022
Magnetic and geometric effects on the electronic transport of metallic nanotubes
Serafim, F.; Santos, F. A. N.; Lima, J. R. F.; Fumeron, S.; Berche, B.; Moraes, F.
2021. Journal of applied physics, 129 (4), Art.-Nr.: 044301. doi:10.1063/5.0031667
Polaronic effect of a metal layer on variable range hopping
Asban, O.; Burin, A.; Shnirman, A.; Schechter, M.
2021. Physical review / B, 103 (4), Art.-Nr: 045129. doi:10.1103/PhysRevB.103.045129
Electronic, magnetic and optical properties of penta-BN nanoribbons: A first principles study
Dantas, M. A. L.; Frazão, N. F.; Azevedo, D. L.; Lima, J. R. F.
2021. Computational materials science, 190, Art.-Nr.: 110275. doi:10.1016/j.commatsci.2020.110275
Principles of carbon nanotube dielectrophoresis
Li, W.; Hennrich, F.; Flavel, B. S.; Dehm, S.; Kappes, M.; Krupke, R.
2021. Nano research, 14 (7), 2188–2206. doi:10.1007/s12274-020-3183-0
Microwave Spectroscopy of the Low-Temperature Skyrmion State in CuOSeO
Aqeel, A.; Sahliger, J.; Taniguchi, T.; Mändl, S.; Mettus, D.; Berger, H.; Bauer, A.; Garst, M.; Pfleiderer, C.; Back, C. H.
2021. Physical review letters, 126 (1), Art.-Nr.: 017202. doi:10.1103/PhysRevLett.126.017202
Multi-atom quasiparticle scattering interference for superconductor energy-gap symmetry determination
Sharma, R.; Kreisel, A.; Sulangi, M. A.; Böker, J.; Kostin, A.; Allan, M. P.; Eisaki, H.; Böhmer, A. E.; Canfield, P. C.; Eremin, I.; Séamus Davis, J. C.; Hirschfeld, P. J.; Sprau, P. O.
2021. npj quantum materials, 6 (1), Art.-Nr.: 7. doi:10.1038/s41535-020-00303-4
Electron–phonon interaction in In-induced structures on Si(111) from first-principles
Sklyadneva, I. Y.; Heid, R.; Echenique, P. M.; Chulkov, E. V.
2021. Physical chemistry, chemical physics, 23, 7955–7960. doi:10.1039/D0CP05234E
Charge Density Waves in YBa₂Cu₃O₆₆₇ Probed by Resonant X-Ray Scattering under Uniaxial Compression
Kim, H.-H.; Lefrançois, E.; Kummer, K.; Fumagalli, R.; Brookes, N. B.; Betto, D.; Nakata, S.; Tortora, M.; Porras, J.; Loew, T.; Barber, M. E.; Braicovich, L.; Mackenzie, A. P.; Hicks, C. W.; Keimer, B.; Minola, M.; Le Tacon, M.
2021. Physical review letters, 126 (3), Article no: 037002. doi:10.1103/PhysRevLett.126.037002
What do 3d-4f butterflies tell us?
Peng, Y.; Powell, A. K.
2021. Coordination chemistry reviews, 426, Art.-Nr.: 213490. doi:10.1016/j.ccr.2020.213490
Josephson harmonics in tunnel junctionsDennis Rieger/Patrick Winkel, KIT
Fundamental Equation for Superconducting Quantum Bits Revised

Physicists from the Karlsruhe Institute of Technology and Forschungszentrum Jülich have uncovered that Josephson tunnel junctions – the fundamental building blocks of superconducting quantum computers – are more complex than previously thought. Just like overtones in a musical instrument, harmonics are superimposed on the fundamental mode. As a consequence, corrections may lead to quantum bits that are 2 to 7 times more stable. The researchers support their findings with experimental evidence from multiple laboratories across the globe.

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Quantenmaterialien: Supraleiter unter DruckNature
Quantum materials: Under pressure superconductors perform at their best

The hardness of a material normally is set by the strength of chemical bonds between electrons of neighboring atoms, not by freely flowing conduction electrons. More than 60 years ago, Lifshitz discussed a counterintuitive possibility: lattice softening driven by conduction electrons at topological Fermi surface transitions. Using a special pressure cell to tune the ultraclean metal strontium ruthenate while measuring the stress-strain relationship, researchers at KIT and the Max Planck Institute for Chemical Physics of Solids reveal a huge softening of the Young’s modulus at a Lifshitz transition of a two-dimensional Fermi surface and show that it is indeed driven entirely by the conduction electrons of the relevant energy band.

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Wernsdorfer ERC Synergy grant Dark MatterAmadeus Bramsiepe (KIT)
Quantum technologies: Deep look into dark matter

The European Research Council (ERC) has selected the international project “Quantum Technologies for Axion Dark Matter Search”, or DarkQuantum for short, for funding with an ERC Synergy Grant. Wolfgang Wernsdorfer from the KIT is involved in the project as lead researcher. DarkQuantum aims to experimentally prove the existence of axions using quantum technologies. These so far hypothetical elementary particles are considered promising candidates for dark matter.

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Metelmann Brückenprofessur Karlsruhe-StraßburgAdrian Yass (KIT)
KIT involved in the European Quantum Center

Researching and teaching across borders - Professor Anja Metelmann from KIT uses this opportunity in the Quantum Computing research field of the Upper Rhine university association Eucor - The European Campus. With the newly opened European Quantum Center in Strasbourg, which acts as a sister institute to the KIT Institute for Quantum Materials and Technologies, the scientist will further expand the collaboration between KIT and the University of Strasbourg as a bridge professor. This involves research on artificial quantum systems such as superconducting circuits or electro-optomechanical systems.

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Physik-Preis Dresden 2023 to Jörg SchmalianUta Gneisse MPI PKS
Physik-Preis Dresden awarded to Jörg Schmalian

The Physik-Preis Dresden 2023 was awarded to Jörg Schmalian. The prize is awarded annually jointly by the Max Planck Institute for the Physics of Complex Systems (MPI-PKS) and the Faculty of Physics at Dresden University of Technology. He was honored for his outstanding contributions to the theory of condensed matter and the special significance of his work for the cooperation between the two DRESDEN-concept partners MPI-PKS and TU Dresden and that thereby their connection has been further strengthened in the long term.

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EU project TruePAPhysikalisch-Technische Bundesanstalt
Key components for quantum technology

In the EU-funded and KIT-coordinated project TruePA (Truly Resilient Quantum Limited Traveling Wave Parametric Amplifiers) researchers develop the next generation of parametric amplifiers which could become a key component for quantum computers and other devices.

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Resistance change leads to insulating, metallic and superconducting behavior of nanowiresHannes Rotzinger (KIT)
Quantum technology: new method allows adaptable superconducting quantum bits

Superconducting qubits are similar in structure to computer chips, but require very low temperatures to operate because only then do they lose their electrical resistance and become superconducting. An international research team with participation of the Karlsruhe Institute of Technology (KIT) has now treated nanometer-scale wires with a new method and lowered the electrical resistance in a controlled manner with targeted electrical pulses. Depending on the strength of the applied electrical pulses, either insulating, conducting or superconducting behavior could be observed at low temperatures.

Publication
Based on the Europium(III) scientists aim to advance the development of Quantum Computers. (S. Kuppusamy, KIT)S. Kuppusamy, KIT
A Molecule That Responds to Light

Light can be used to operate quantum information processing systems, e.g. quantum computers, quickly and efficiently. Researchers at Karlsruhe Institute of Technology (KIT) and Chimie ParisTech/CNRS have now significantly advanced the development of molecule-based materials suitable for use as light-addressable fundamental quantum units. As they report in the journal Nature Communications, they have demonstrated for the first time the possibility of addressing nuclear spin levels of a molecular complex of europium(III) rare-earth ions with light. (DOI: 10.1038/s41467-021-22383-x)

Press Release 032/2021
Visualization of a quantum processorC. Hohmann/KIT
Technologies for More Powerful Quantum Computers

Quantum computers will efficiently solve problems that could not be solved in the past. Within the framework of the “GeQCoS“ collaboration project, Germany’s leading researchers in the area of superconducting quantum circuits are working on innovative concepts for designing better quantum processors.

Press Release 006/2021