Article
Materials Science, Multidisciplinary
A. D. Mahabir, A. Balatsky, J. T. Haraldsen
Summary: The study examines the effects and interactions of two electronic bands with negative electronic compressibility in a two-dimensional electron gas, showing how effective mass and relative permittivity relate to critical carrier density. It demonstrates the significant impact of second band population and interband coupling on crossover carrier density, and suggests a potential method for identifying multiband electronic systems based on precise bulk electronic properties measurements. Investigating the NEC in the 2DEG at the LAO/STO interface, it determines the likely realization of a two-band 2DEG and provides general limits on interband coupling relative to electronic band population.
Article
Materials Science, Multidisciplinary
Yu Wang, Linlu Wu, Zheng Wei, Zijia Liu, Peng Cheng, Yiqi Zhang, Baojie Feng, Guangyu Zhang, Wei Ji, Kehui Wu, Lan Chen
Summary: Quantum confinement has significant effects on the band structure and optoelectronic performance of semiconducting materials. This study detected the quantized electronic states of few-layered MoS2 and investigated the influence of interlayer hybridization and substitutional defects on these states. The results provide insights into the manipulation of electronic states in few-layered TMDs and suggest potential applications in subband transitions, spin splitting, photoexcitation, and electronic devices.
Article
Physics, Multidisciplinary
Christian Baumgartner, Lorenz Fuchs, Linus Fresz, Simon Reinhardt, Sergei Gronin, Geoffrey C. Gardner, Michael J. Manfra, Nicola Paradiso, Christoph Strunk
Summary: Simultaneous measurements of Josephson inductance and dc transport characteristics in ballistic Josephson junctions reveal important parameters without the need for phase bias. The method allows for deep probing of devices in the nondissipative regime, showing sensitivity to specific characteristics such as supercurrent interference.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Xiaoming Zhang, Feng Liu
Summary: The study shows that Majorana edge states can be achieved by magnetizing topological surface states, with the axion insulator state realizing helical MES. The stability of the TSC phase is determined by comparing the square of the sum of two superconducting gaps. By predicting MnBi2Te4/Bi2Te3 film on a superconducting substrate as an experimental platform, chiral MESs can be realized within a wide energy range.
Article
Materials Science, Multidisciplinary
Rodrigo A. Fontenele, Natanael C. Costa, Raimundo R. dos Santos, Thereza Paiva
Summary: Recent experiments with ultracold fermionic atoms in optical lattices have provided a tunable and clean realization of the attractive Hubbard model (AHM) and have led to the investigation of various physical properties across the crossover between BCS and BEC couplings. Using determinant Quantum Monte Carlo (DQMC) studies, a detailed phase diagram for the critical superconducting temperature T, as well as two additional temperature scales, pairing T-p and degeneracy T-d, have been obtained. The distribution of doubly occupied sites in the momentum distribution function and the quasiparticle weight show distinct features on both sides of the BCS-BEC crossover, suggesting a crossover between Fermi- and non-Fermi liquid behaviors.
Article
Multidisciplinary Sciences
Jinzhong Zhang, Pok-Lam Tse, Abdur-Rehman Jalil, Jonas Koelzer, Daniel Rosenbach, Martina Luysberg, Gregory Panaitov, Hans Lueth, Zhigao Hu, Detlev Gruetzmacher, Jia Grace Lu, Thomas Schaepers
Summary: Despite the limited knowledge on the low-temperature transport properties of GeTe, this study reveals phase-coherent phenomena in GeTe nanowires. The magnetic flux-periodic oscillations observed in the study are attributed to the formation of a tubular hole accumulation layer.
NATURE COMMUNICATIONS
(2021)
Review
Chemistry, Multidisciplinary
Shanfei Zhang, Hao Wu, Li Yang, Gaojie Zhang, Yuanmiao Xie, Liang Zhang, Wenfeng Zhang, Haixin Chang
Summary: This paper reviews the preparation methods, physical properties, device applications, and future development directions of 2D magnetic atomic crystals. Research shows that these crystals have various magnetic properties and potential applications in heterojunctions, reluctance, etc.
MATERIALS HORIZONS
(2022)
Article
Multidisciplinary Sciences
Kohei Matsuura, Masaki Roppongi, Mingwei Qiu, Qi Sheng, Yipeng Cai, Kohtaro Yamakawa, Zurab Guguchia, Ryan P. Day, Kenji M. Kojima, Andrea Damascelli, Yuichi Sugimura, Mikihiko Saito, Takaaki Takenaka, Kota Ishihara, Yuta Mizukami, Kenichiro Hashimoto, Yilun Gu, Shengli Guo, Licheng Fu, Zheneng Zhang, Fanlong Ning, Guoqiang Zhao, Guangyang Dai, Changqing Jin, James W. Beare, Graeme M. Luke, Yasutomo J. Uemura, Takasada Shibauchi
Summary: Iron-chalcogenide superconductors FeSe1-xSx have unique electronic properties and the nature of superconductivity with nematicity is important for understanding unconventional superconductivity. Recent experiments show that the superconducting state in FeSe1-xSx breaks time-reversal symmetry and exhibits ultranodal pair state. The presence of broken TRS and suppressed superfluid density suggests the existence of two different superconducting states separated by the nematic critical point.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Physics, Applied
M. Marcin, Z. Pribulova, J. Kacmarcik, Z. Medvecka, T. Klein, V. Yu Verchenko, V Cambel, J. Soltys, P. Samuely
Summary: The magnetization properties of the endohedral cluster superconductor Mo8Ga41 were studied using sensitive Hall-probe magnetometry. The results showed that the system is inherently a single-gap s-wave superconductor with minor additional phases present in seemingly perfect samples, potentially leading to misinterpretation of multigap superconductivity in Mo8Ga41.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Siheon Ryee, Myung Joon Han, Sangkook Choi
Summary: Motivated by the discovery of superconductivity in infinite-layer nickelates, this study investigates the role of Hund coupling J in a quarter-filled two-orbital Hubbard model. The results reveal distinctive regimes of correlated metals, with one related to Mott insulator proximity. Defines criteria for characterizing these metals, establishing the existence of Hund metallicity in two-orbital systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
San-Jun Zhang, Da Wang, Qiang-Hua Wang
Summary: Recent experiments in Sr2RuO4 suggest the presence of a multicomponent pairing function, with a theoretical cusp in the transition temperature Tc that can be easily smeared out by spatial inhomogeneity of strain. Experimental data can be qualitatively reproduced by a percolation model. Additionally, a thorough group-theoretical classification of the pairing functions reveals two types of intraorbital pairings that are favorable in view of most existing experiments.
Article
Chemistry, Physical
Jialuo Dong, Pan Zhou, Yuzhong Hu, Lizhong Sun
Summary: Recently, there has been a growing interest in flat-band physics due to its attractive properties and wide range of practical applications. In this study, two novel two-dimensional monolayers, B3C11O6 and B3C15O6, exhibiting flat bands near the Fermi level, are introduced. These monolayers are found to be energetically favorable, dynamically stable, and thermodynamically stable. The presence and characteristics of the flat bands strongly depend on the interactions between carbon atoms. Our research not only presents two types of lattices capable of hosting flat bands, but also provides two monolayers that can be used to investigate various intriguing quantum phases.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Multidisciplinary Sciences
Angela Montanaro, Francesca Giusti, Matteo Zanfrognini, Paola Di Pietro, Filippo Glerean, Giacomo Jarc, Enrico Maria Rigoni, Shahla Y. Mathengattil, Daniele Varsano, Massimo Rontani, Andrea Perucchi, Elisa Molinari, Daniele Fausti
Summary: The authors investigate the optical response of bulk black phosphorus to mid-infrared pulses, and find that while above-gap excitation leads to a broadband light-induced transparency, sub-gap pulses drive an anomalous response, peaked at the single-layer exciton resonance.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
F. Liu, F. Qu, I Zutic, S. Xie, D. Liu, A. L. A. Fonseca, M. Malard
Summary: This study demonstrates that robust nodal-line semimetals can be achieved in two-dimensional materials by introducing vacancies on the lattice, which is related to nonsymmorphic symmetries.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Adolfo O. Fumega, Jose L. Lado
Summary: In this work, it is demonstrated that AB bilayer graphene encapsulated in MoTe2 acts as a valley valve that displays a switchable built-in topological gap, leading to ferroelectrically driven topological channels.