Article
Multidisciplinary Sciences
J. Ayres, M. Berben, M. Culo, Y-T Hsu, E. van Heumen, Y. Huang, J. Zaanen, T. Kondo, T. Takeuchi, J. R. Cooper, C. Putzke, S. Friedemann, A. Carrington, N. E. Hussey
Summary: Strange metals exhibit unconventional electrical properties such as linear resistivity, inverse Hall angle, and linear magnetoresistance. Research suggests that these anomalies in cuprates may be related to a quantum critical point inside the superconducting dome, extending beyond the critical doping level. The presence of two charge sectors, one with coherent quasiparticles and the other with scale-invariant 'Planckian' dissipators, indicates a complex behavior in the strange-metal regime.
Article
Materials Science, Multidisciplinary
H. U. Ozdemir, Vivek Mishra, N. R. Lee-Hone, Xiangru Kong, T. Berlijn, D. M. Broun, P. J. Hirschfeld
Summary: Recent experimental papers suggest the breakdown of the quasiparticle-based Landau-BCS paradigm in the superconducting state due to unexpected behavior. However, the authors argue that a phenomenological dirty d-wave theoretical analysis can explain most aspects of the superconducting state by considering the unusual effects of weak, out-of-plane dopant impurities. In this study, ab initio calculations were performed to quantitatively analyze the theory by considering realistic band structures, Fermi liquid renormalizations, and vertex corrections.
Article
Materials Science, Multidisciplinary
Zi-Xiang Li, Steven A. Kivelson, Dung-Hai Lee
Summary: This paper presents a theoretical framework for understanding the behavior of overdoped cuprate high temperature superconductors, focusing on d-wave pairing, flat antinodal dispersion, and disorder. Even with homogeneous disorder, these factors lead to granular superconducting correlations and a transition temperature determined largely by the superfluid stiffness rather than the pairing scale.
NPJ QUANTUM MATERIALS
(2021)
Article
Physics, Multidisciplinary
Changwei Zou, Zhenqi Hao, Xiangyu Luo, Shusen Ye, Qiang Gao, Miao Xu, Xintong Li, Peng Cai, Chengtian Lino, Xingjiang Zhou, Dung-Hai Lee, Yayu Wang
Summary: A real-space investigation of cuprates doped beyond the optimal point reveals unconventional behavior in the superconducting state due to pair-breaking scattering. This study shifts the focus of cuprate superconductors research to the overdoped regime and uncovers new unconventional behavior.
Article
Materials Science, Multidisciplinary
K. von Arx, Qisi Wang, S. Mustafi, D. G. Mazzone, M. Horio, D. John Mukkattukavil, E. Pomjakushina, S. Pyon, T. Takayama, H. Takagi, T. Kurosawa, N. Momono, M. Oda, N. B. Brookes, D. Betto, W. Zhang, T. C. Asmara, Y. Tseng, T. Schmitt, Y. Sassa, J. Chang
Summary: In high-temperature cuprate superconductors, the stripe order evolution across optimal doping remains controversial. This study investigates weak charge correlations in La2-xSrxCuO4 and La1.8-xEu0.2SrxCuO4 using resonant inelastic X-ray scattering. The results reveal temperature-dependent long-range stripe order only below optimal doping, while temperature-independent short-range correlations exist at higher doping, suggesting an unresolved electron-phonon coupling origin.
NPJ QUANTUM MATERIALS
(2023)
Article
Multidisciplinary Sciences
D. Nicoletti, M. Buzzi, M. Fechner, P. E. Dolgirev, M. H. Michael, J. B. Curtis, E. Demler, G. D. Gu, A. Cavalleri
Summary: Research finds that coherent terahertz radiation can be emitted by surface Josephson plasmons when there are incommensurate or fluctuating charge stripes in cuprates.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Physics, Multidisciplinary
I. A. Makarov, S. G. Ovchinnikov
Summary: In this work, the concentration and temperature dependence of the superconducting gap in the orthorhombic phase of the HTSC cuprate were analyzed using the Hubbard model. The reasons for the unexpectedly large s*-wave component of the superconducting gap in the overdoped regime were investigated by studying the electronic structure of low-energy excitations and the k-dependent contributions of pair states. It was found that the increase in the s*-wave component resulted from the shallow electron pocket in the region of the s*-wave component maximum.
Article
Materials Science, Multidisciplinary
S. Dordevic, C. C. Homes
Summary: This study investigates the superfluid density of overdoped La2???xSrxCuO4 thin films and reveals that it does not conform to previous theories. It is found that the superfluid density in the thin films is significantly suppressed compared to bulk samples. In contrast, the superfluid density in bulk samples tends to saturate rather than decrease with doping. This saturation phenomenon may not be limited to cuprate superconductors but also observed in pnictide superconductors. Quantum phase fluctuations are argued to play a crucial role in suppressing the superfluid density in thin films.
Article
Physics, Multidisciplinary
Shingo Teranishi, Kazutaka Nishiguchi, Seiji Yunoki, Koichi Kusakabe
Summary: The study theoretically investigates ferromagnetic fluctuations in heavily overdoped cuprate superconductors, with the findings indicating that a decrease in on-site Coulomb interaction leads to the emergence of ferromagnetic fluctuations in this regime.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2021)
Article
Physics, Multidisciplinary
Goetz Seibold, Riccardo Arpaia, Ying Ying Peng, Roberto Fumagalli, Lucio Braicovich, Carlo Di Castro, Marco Grilli, Giacomo Claudio Ghiringhelli, Sergio Caprara
Summary: A strange metallic state above the pseudogap temperature T-* in cuprates has puzzled scientists for a long time. Recent experiments have identified charge density fluctuations as a possible microscopic mechanism underlying this behavior, shedding light on the mysteries surrounding the strange metal phenomenology.
COMMUNICATIONS PHYSICS
(2021)
Article
Multidisciplinary Sciences
Ta Tang, Brian Moritz, Cheng Peng, Zhi-Xun Shen, Thomas P. Devereaux
Summary: This study demonstrates that extended electron-phonon coupling is a significant factor in generating the attractive coupling observed in one-dimensional cuprate materials, and can reproduce the spectral features and doping dependence seen in experiments.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Mainak Pal, Andreas Kreisel, W. A. Atkinson, P. J. Hirschfeld
Summary: Theoretical studies of disordered d-wave superconductors have mainly focused on optimally doped models with strong scatterers, but it is necessary to also study the weaker scattering associated with dopant atoms in order to address recent controversies about overdoped cuprates. In this study, simple models of such systems are investigated using the self-consistent Bogoliubov-de Gennes (BdG) framework and compared to disorder-averaged results using the self-consistent T-matrix-approximation (SCTMA). The SCTMA performs well overall, except for highly disordered systems with strongly suppressed superfluid density.
Article
Materials Science, Multidisciplinary
Rui-Ying Mao, Da Wang, Congjun Wu, Qiang-Hua Wang
Summary: This study investigates the magnetotransport phenomena in overdoped La2-xSrxCuO4 (LSCO) systems based on the Fermi liquid assumption. The results show that near the Van Hove singularity, the Hall coefficient RH and magnetoresistivity ρ(xx) exhibit distinct behaviors as the doping concentration changes, providing insights into the Fermi liquid picture in these systems.
Article
Physics, Multidisciplinary
Kamran Behnia
Summary: La1.67Sr0.33CuO4 is not a superconductor with a T-2 temperature dependence, while La1.71Sr0.29CuO4 exhibits superconductivity with a T-Linear term in its resistivity. The unusually large electron-electron collision rate above a critical doping may play a role in the emergence of these two distinct features.
Article
Multidisciplinary Sciences
Gideok Kim, Ksenia S. Rabinovich, Alexander Boris, Alexander N. Yaresko, Y. Eren Suyolcu, Yu-Mi Wu, Peter A. van Aken, Georg Christiani, Gennady Logvenov, Bernhard Keimer
Summary: By using atomic layer-by-layer oxide molecular beam epitaxy, epitaxial thin films of La2-xCaxCuO4 with x up to 0.5 were successfully grown, exhibiting superconductivity with Tc of 15 to 20 K. The nearly identical radii of La and Ca ions in the material were found to minimize the impact of structural disorder, leading to an extended superconducting dome in the phase diagram of cuprates.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Crystallography
Nikolina Novosel, David Rivas Gongora, Zvonko Jaglicic, Emil Tafra, Mario Basletic, Amir Hamzic, Teodoro Klaser, Zeljko Skoko, Kresimir Salamon, Ivna Kavre Piltaver, Mladen Petravic, Bojana Korin-Hamzic, Silvia Tomic, Boris P. Gorshunov, Tao Zhang, Tomislav Ivek, Matija Culo
Summary: This study investigates the changes in properties of La1-xCaxMnO3 ceramic samples with different grain sizes at the boundary between CO/AFM insulating and FM metallic phases. It is found that as disorder increases, the resistivity decreases significantly, VRH collapses, the CO/AFM phase is suppressed, and FM contribution increases. These results are interpreted within the core-shell model and Anderson localization theory.
Editorial Material
Multidisciplinary Sciences
Nigel E. Hussey, Caitlin Duffy
Article
Materials Science, Multidisciplinary
M. Berben, S. Smit, C. Duffy, Y-T Hsu, L. Bawden, F. Heringa, F. Gerritsen, S. Cassanelli, X. Feng, S. Bron, E. van Heumen, Y. Huang, F. Bertran, T. K. Kim, C. Cacho, A. Carrington, M. S. Golden, N. E. Hussey
Summary: Once doped away from their parent Mott insulating state, the hole-doped cuprates enter into many varied and exotic phases. The onset temperature of each phase is then plotted versus p-the number of doped holes per copper atom-to form a representative phase diagram. Apart from differences in the absolute temperature scales among the various families, the resultant phase diagrams are strikingly similar. In particular, the p values corresponding to optimal doping and to the end of the pseudogap phase are essentially the same for all cuprate families except for the single-layer Bi-based cuprate Bi2+z-yPbySr2-x-zLaxCuO6+delta (Bi2201). This anomaly arises partly due to the complex stoichiometry of this material and also to the different p values inferred from disparate measurements performed on samples with comparable superconducting transition temperatures T-c. Here, by combining measurements of in-plane resistivity in zero and high magnetic fields with angle-resolved photoemission spectroscopy studies, we argue that the phase diagram of Bi2201 may actually be similar to that realized in other families, supporting the notion of universality of p(opt) and p* in all hole-doped cuprates.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Multidisciplinary
Y. -t. Hsu, M. Osada, B. Y. Wang, M. Berben, C. Duffy, S. P. Harvey, K. Lee, D. Li, S. Wiedmann, H. Y. Hwang, N. E. Hussey
Summary: This study investigates the resistivity behavior in undoped nickelate materials and examines the impact of disorder and doping on its temperature dependence. The results reveal that the level of doping has little correlation with the magnitude and onset temperature of the resistivity upturn, while the different rare-earth families play a crucial role in the evolution of the insulating behavior.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Jake Ayres, Matija Culo, Jonathan Buhot, Bence Bernath, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi, Antony Carrington, Sven Friedemann, Nigel E. Hussey
Summary: In this study, the authors investigate the resistive properties of sulfur-doped FeSe under applied pressure and find evidence of a decoupling of electronic nematicity and magnetic fluctuations in this system.
COMMUNICATIONS PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Uddipta Kar, Akhilesh Kr. Singh, Yu-Te Hsu, Chih-Yu Lin, Bipul Das, Cheng-Tung Cheng, M. Berben, Song Yang, Chun-Yen Lin, Chia-Hung Hsu, S. Wiedmann, Wei-Cheng Lee, Wei-Li Lee
Summary: In a thin Weyl semimetal, a thickness dependent Weyl-orbit quantum oscillation was observed by carrying out magneto-transport measurements on SrRuO3 thin films. The quantum oscillations with a frequency F-s1 of approximately 30 T appear to have a small Fermi pocket with a light effective mass. The oscillation amplitude is maximized for thicknesses between 10 and 20 nm, and the phase of oscillation shows a systematic change with film thickness. The F-s1 oscillation is attributed to be of surface origin based on thickness and field-orientation dependence.
NPJ QUANTUM MATERIALS
(2023)
Article
Multidisciplinary Sciences
Bai Yang Wang, Tiffany C. Wang, Yu-Te Hsu, Motoki Osada, Kyuho Lee, Chunjing Jia, Caitlin Duffy, Danfeng Li, Jennifer Fowlie, Malcolm R. Beasley, Thomas P. Devereaux, Ian R. Fisher, Nigel E. Hussey, Harold Y. Hwang
Summary: The search for superconductivity in infinite-layer nickelates, inspired by the cuprates, has encountered debates regarding the impact of varying rare-earth elements on these materials. In this study, we observe significant differences in the magnitude and anisotropy of the superconducting upper critical field across different rare-earth nickelates, namely La-, Pr-, and Nd-nickelates. These differences originate from the 4f electron characteristics of the rare-earth ions in the lattice, with La3+ being absent, Pr3+ being nonmagnetic, and Nd3+ being magnetic. The unique magnetoresistance found in Nd-nickelates can be attributed to the magnetic contribution of Nd3+ 4f moments. The robust and tunable superconductivity exhibited by these materials holds promise for future high-field applications.
Article
Multidisciplinary Sciences
M. Culo, S. Licciardello, K. Ishida, K. Mukasa, J. Ayres, J. Buhot, Y. T. Hsu, S. Imajo, M. W. Qiu, M. Saito, Y. Uezono, T. Otsuka, T. Watanabe, K. Kindo, T. Shibauchi, S. Kasahara, Y. Matsuda, N. E. Hussey
Summary: The authors present high-field magnetotransport measurements of FeSe1-xSx and FeSe1-xTex, which show a broad quantum vortex liquid regime. This indicates the presence of a quantum vortex liquid state and the destruction of the Abrikosov lattice by intense quantum fluctuations at very low temperatures.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
R. D. H. Hinlopen, F. A. Hinlopen, J. Ayres, N. E. Hussey
Summary: Strange metals exhibit a linear increase in resistivity with magnetic field. The presence of strong anisotropic scattering can generate magnetoresistance, but it saturates at high magnetic field strengths. A bounded sector on the Fermi surface is required for the realization of quadratic-to-linear magnetoresistance.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
J. F. Linnartz, C. S. A. Mueller, Yu-Te Hsu, C. Breth Nielsen, M. Bremholm, N. E. Hussey, A. Carrington, S. Wiedmann
Summary: This study provides a detailed investigation of the magnetic behavior of WTe2, accurately determining its Fermi surface and explaining its unusual electronic properties. The Russian-doll nested Fermi surface model is confirmed, and it is found that impurity damping solely determines the onset of magnetic breakdown in WTe2.
PHYSICAL REVIEW RESEARCH
(2022)