Article
Chemistry, Physical
Yujie Chen, Juan Jiang, Haifeng Yang, Pavel Dudin, Alexey Barinov, Zhongkai Liu, Haihu Wen, Lexian Yang, Yulin Chen
Summary: The Type-II iron-based superconductors exhibit unique properties such as high Neel temperature and phase separation. This study focuses on the electronic structure of superconducting KxFe2-ySe2, revealing clear electronic phase separation into metallic islands and insulating matrix with different K and Fe concentrations. The results provide insights into the composition and electronic structures of phase-separated superconducting and insulating phases of KxFe2-ySe2, shedding light on the unique physics in Type-II Fe-SCs.
Article
Materials Science, Multidisciplinary
Fei Gao, Jieming Sheng, Weijun Ren, Qiang Zhang, Xiaohua Luo, Ji Qi, Mengru Cong, Bing Li, Liusuo Wu, Zhidong Zhang
Summary: In this study, we investigated the magnetic structure and magnetocaloric effect of the ternary compound HoAl2Ge2. We found that HoAl2Ge2 exhibits an incommensurate spin density wave and has a special arrangement of magnetic moments, resulting in interesting physical phenomena and large magnetocaloric effects. We also examined the influence of magnetic field on the magnetocaloric effect and discussed the mechanism behind the observed effects.
Article
Materials Science, Multidisciplinary
Ruoshi Jiang, Zi-Jian Lang, Tom Berlijn, Wei Ku
Summary: Carrier density is a key factor in controlling material properties, especially in strongly correlated materials. In correlated semimetals, the carrier density can vary sensitively against weak external controls such as temperature, magnetic field, and pressure. Through simulation, it has been discovered that short-range correlation can reversely modulate the carrier density in semimetals, which opens up new possibilities for functionalizing these materials.
Article
Materials Science, Multidisciplinary
Yaokun Su, Hillary L. Smith, Matthew B. Stone, Douglas L. Abernathy, Mark D. Lumsden, Carl P. Adams, Chen Li
Summary: In this study, an unconventional scattering anomaly was reported in FeGe2, demonstrating near-perfect magnetic frustration and the emergence of unexpected two-dimensional magnetic order in the quasi-one-dimensional structure. This finding is of great significance for understanding exotic quantum phenomena in materials.
Article
Chemistry, Multidisciplinary
Liyuan Li, Haotian Li, Kaiyuan Zhou, Xiao Xiao, Lina Chen, Fusheng Ma, Junran Zhang, Lin Wang, Lei Zhang, Ronghua Liu
Summary: This study systematically investigates the temperature- and magnetic-field-dependent magnetic dynamics of the chiral helimagnet CrNb3S6. The research discovers temperature-independent optical modes and ferromagnetic resonance modes in the CSL phase, and provides a detailed phase diagram and temporal-spatial resolution of dynamic modes, which may contribute to the development of high-frequency spintronic devices.
Article
Astronomy & Astrophysics
M. Loewe, D. Valenzuela, R. Zamora
Summary: In this article, we explore the phase diagram associated with the symmetry breaking of a scalar self-interacting theory induced by temperature and the presence of an external electric field. We calculate the boson propagator in the presence of a constant external electric field in the weak and strong field strength limits. Novel expansions for the effective potential, valid for the entire temperature range, are derived. We find inverse electric catalysis in the weak field region, where the critical temperature decreases with increasing electric field strength, while electric catalysis emerges in the strong field region. These behaviors are valid for all possible temperature values.
Article
Chemistry, Multidisciplinary
David Galvez, Mario Castro, Guilherme Bittencourt, Vagson Carvalho, Sebastian Allende
Summary: This study presents the analysis of the stability of magnetic bimerons in a cylindrical nanotube and investigates the influence of magnetic and geometrical parameters. The results demonstrate the stability region of bimerons and reveal two other magnetic states.
Article
Materials Science, Multidisciplinary
Gao-Wei Qiu, Yi Zhou
Summary: Under the influence of a magnetic field, two weakly linked superconducting ultrathin films exhibit different superconducting states, with one characterized by staggered supercurrent loops and a superfluid density wave, and the other by uniform superfluid density. The phase transition between these two states falls within a specific universality class.
Review
Chemistry, Physical
D. Szymanski, R. Zach, J. Tobola, W. Chajec, R. Duraj, L. Gondek, S. Baran, M. Michalec, P. Chaudouet, S. Haj-Khlifa, E. K. Hlil, D. Fruchart
Summary: The crystal structure of the MnRuxRh1-xAs system belongs to the hexagonal Fe2P-type structure with magnetic phase transitions. For x>0.75, the compounds exhibit ferromagnetic ordering, while a drop in Curie temperature is observed with the increase of Rh concentration. In the range of x<0.2, the MnRuxRh1-xAs system undergoes successive antiferromagnetic arrangements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Multidisciplinary
QinQing Zhu, Liang Li, ZhiHua Yang, ZheFeng Lou, JianHua Du, JinHu Yang, Bin Chen, HangDong Wang, MingHu Fang
Summary: The magnetic and transport properties of EuAg4As2 single crystals were systematically studied, revealing different magnetic behaviors under various magnetic fields, potential applications in magnetic sensors due to unexpected magnetoresistance variations, and construction of magnetic phase diagrams for both H//ab and H//c.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Article
Physics, Multidisciplinary
Lei Qiao, Ning-hua Wu, Tianhao Li, Siqi Wu, Zhuyi Zhang, Miaocong Li, Jiang Ma, Baijiang Lv, Yupeng Li, Chenchao Xu, Qian Tao, Chao Cao, Guang-Han Cao, Zhu-An Xu
Summary: The coexistence of superconductivity and antiferromagnetic order in the compound Er2O2Bi with anti-ThCr2Si2-type structure was investigated through various measurements and calculations, revealing similar superconducting properties to the non-magnetic superconductor Y2O2Bi and a competition between superconductivity and antiferromagnetic order. Increasing oxygen content in Er2OxBi led to an increase in T-c and a slight decrease in T-N, with Hall effect measurements showing an increase in hole-type carrier density with oxygen content.
FRONTIERS OF PHYSICS
(2021)
Article
Multidisciplinary Sciences
Andrew Hardy, Arijit Haldar, Arun Paramekanti
Summary: We propose and study a two-orbital lattice extension of the Sachdev-Ye-Kitaev model in the large-N limit. The phase diagram of this model features a high-temperature isotropic non-Fermi liquid which undergoes first-order thermal transition into a nematic insulator or continuous thermal transition into a nematic metal phase, separated by a tunable tricritical point. These phases arise from spontaneous partial orbital polarization of the multiorbital non-Fermi liquid. We explore the spectral and transport properties of this model, including d.c. elastoresistivity, which exhibits a peak near nematic transition, as well as nonzero frequency elastoconductivity. Our work offers a useful perspective on nematic phases and transport in correlated multiorbital systems.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Multidisciplinary
Jun-Yung Oh, Young-Jae Ko, Dong-Seok Yang, Jung-Min Lee, W. N. Kang, Byeongwon Kang
Summary: The study investigates the impact of strain states on magnetic flux pinning in GdBCO and LSMO bilayer systems grown on different substrates, with XAS revealing distortions in the MnO6 octahedron. Tensile strain on STO substrate causes slight elongation of in-plane MnO6 octahedra and reduced magnetization anisotropy in LSMO; while compressive strain on LAO substrate results in significant elongation of out-of-plane MnO6 octahedra and large magnetic anisotropy.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Physical
V Paul-Boncour, K. Provost, T. Mazet, A. N'Diaye, E. Alleno, F. Couturas
Summary: At different temperatures, the structures and magnetic properties of Y0.9Gd0.1Fe2Hx hydrides change sequentially. Above 300K, they undergo a first-order transition and exhibit negative and positive magnetic entropy variations. The proposed structural and magnetic phase diagram provides a better understanding of the properties of these hydrides.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Wei Shao, Jose Manuel Guevara-Vela, Antonio Fernandez-Caballero, Sha Liu, Javier LLorca
Summary: The solid-state region of the Ni-Al phase diagram is predicted accurately by combining first-principles calculations and Monte Carlo simulations. The computed phase diagram agrees well with the experimental phase diagram and provides additional information about the phase boundary between AlNi3 and Ni below 300 K. The study also analyzes the individual contributions of vibrational entropy and magnetic effects to the stability and solubility of different phases.
Article
Physics, Multidisciplinary
Ningning Wang, Yuhao Gu, M. A. McGuire, Jiaqiang Yan, Lifen Shi, Qi Cui, Keyu Chen, Yuxin Wang, Hua Zhang, Huaixin Yang, Xiaoli Dong, Kun Jiang, Jiangping Hu, Bosen Wang, Jianping Sun, Jinguang Cheng
Summary: This study reports on the synthesis, structure, and physical properties of a bilayer kagome lattice compound V3Sb2. It was found that V3Sb2 undergoes a density-wave-like transition at T(dw) approximately 160 K. The study also revealed that V3Sb2 exhibits non-trivial topological crystalline properties.
Article
Multidisciplinary Sciences
Jie Yuan, Qihong Chen, Kun Jiang, Zhongpei Feng, Zefeng Lin, Heshan Yu, Ge He, Jinsong Zhang, Xingyu Jiang, Xu Zhang, Yujun Shi, Yanmin Zhang, Mingyang Qin, Zhi Gang Cheng, Nobumichi Tamura, Yi-feng Yang, Tao Xiang, Jiangping Hu, Ichiro Takeuchi, Kui Jin, Zhongxian Zhao
Summary: The research uncovers the precise quantitative scaling laws among the superconducting transition temperature, the linear-in-T scattering coefficient, and the doping level in electron-doped copper oxide La2-xCexCuO4, suggesting a common mechanism of the strange-metal behavior and unconventional superconductivity in these systems.
Article
Physics, Multidisciplinary
Yazhou Zhou, Jing Guo, Shu Cai, Jinyu Zhao, Genda Guo, Chengtian Lin, Hongtao Yan, Cheng Huang, Chongli Yang, Sijin Long, Yu Gong, Yanchun Li, Xiaodong Li, Qi Wu, Jiangping Hu, Xingjiang Zhou, Tao Xiang, Liling Sun
Summary: Copper oxide superconductors have the highest ambient-pressure superconducting transition temperature and unconventional electronic behavior. Understanding the relationship between the superconducting and normal metallic states is crucial for uncovering the mechanism of superconductivity. We observed a quantum phase transition from a superconducting state to an insulating-like state in Bi2212 superconductors and found the same phenomenon in related compounds. This universally observed phenomenon poses a challenge to achieving a unified understanding of high-temperature superconductivity.
Article
Multidisciplinary Sciences
Hailan Luo, Qiang Gao, Hongxiong Liu, Yuhao Gu, Dingsong Wu, Changjiang Yi, Junjie Jia, Shilong Wu, Xiangyu Luo, Yu Xu, Lin Zhao, Qingyan Wang, Hanqing Mao, Guodong Liu, Zhihai Zhu, Youguo Shi, Kun Jiang, Jiangping Hu, Zuyan Xu, X. J. Zhou
Summary: This study reveals the electronic nature of the charge density wave (CDW) phase in Kagome superconductors AV(3)Sb(5). Through high-resolution angle-resolved photoemission measurements, CDW-induced Fermi surface reconstruction and band folding are observed, and the Fermi surface- and momentum-dependent CDW gap is measured, showing a strongly anisotropic CDW gap. Furthermore, the authors observe signatures of the electron-phonon coupling in KV3Sb5.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Shengshan Qin, Chen Fang, Fu-Chun Zhang, Jiangping Hu
Summary: In the presence of both space and time reversal symmetries, an s-wave A(19) superconducting state is usually topologically trivial. However, in a certain type of nonsymmorphic lattice structure, an exception can occur. We demonstrate this exception in a time reversal invariant system with a centrosymmetric space group P4/nmm, showing the existence of a second-order topological state protected by a mirror symmetry. This topological superconductivity is characterized by degenerate Dirac cones and Majorana modes.
Article
Physics, Multidisciplinary
Ying Zhou, Long Chen, Gang Wang, Yu-Xin Wang, Zhi-Chuan Wang, Cong-Cong Chai, Zhong-Nan Guo, Jiang-Ping Hu, Xiao-Long Chen
Summary: In this study, the synthesis, magnetism, electrical resistivity, and specific heat capacity of the newly discovered quasi-one-dimensional NaMn6Bi5 superconductor were investigated. The abnormal Bi-Bi bond lengths, antiferromagnetic-like transitions, anisotropic resistivity, and unusually large Sommerfeld coefficient make NaMn6Bi5 a suitable platform to explore the interplay of magnetism and superconductivity.
CHINESE PHYSICS LETTERS
(2022)
News Item
Physics, Multidisciplinary
Kun Jiang, Jiangping Hu
Summary: The article discusses two demonstrations of a superconducting diode effect, showing the possibility of equivalent behavior in superconductors through different mechanisms.
Article
Physics, Multidisciplinary
Yuhao Gu, Kun Jiang, Xianxin Wu, Jiangping Hu
Summary: Researchers predict that a square lattice layer formed by [Co2N2] (2-) diamond-like units can exhibit high-temperature superconductivity. This study provides a new platform for establishing the superconducting mechanism of unconventional high-temperature superconductivity.
CHINESE PHYSICS LETTERS
(2022)
Review
Multidisciplinary Sciences
Kun Jiang, Tao Wu, Jia-Xin Yin, Zhenyu Wang, M. Zahid Hasan, Stephen D. Wilson, Xianhui Chen, Jiangping Hu
Summary: This review discusses the recent progress on the experimental and theoretical studies of kagome superconductors AV(3)Sb(5), including the electronic properties, charge density wave state, time-reversal symmetry breaking, and superconducting properties. The authors aim to stimulate an expanded search for unconventional kagome superconductors.
NATIONAL SCIENCE REVIEW
(2023)
Article
Physics, Multidisciplinary
Xingyu Jiang, Mingyang Qin, Xinjian Wei, Li Xu, Jiezun Ke, Haipeng Zhu, Ruozhou Zhang, Zhanyi Zhao, Qimei Liang, Zhongxu Wei, Zefeng Lin, Zhongpei Feng, Fucong Chen, Peiyu Xiong, Jie Yuan, Beiyi Zhu, Yangmu Li, Chuanying Xi, Zhaosheng Wang, Ming Yang, Junfeng Wang, Tao Xiang, Jiangping Hu, Kun Jiang, Qihong Chen, Kui Jin, Zhongxian Zhao
Summary: Superconductivity is related to the strange-metal state, and the resistivity in the strange metal significantly depends on the superconducting transition temperature. Unconventional superconductors usually exhibit a linear temperature dependence of resistivity (T-linear) in the low-temperature limit. The understanding of the relationship between the strange metal and superconductivity is crucial for further theoretical development, but comprehensive studies are lacking due to the difficulty in controlling the superconducting state. In this study, a typical strange-metal behavior, T-linear resistivity, linear-in-field magnetoresistance, and universal scaling of magnetoresistance, is observed in FeSe. The relationship between the T-linear resistivity coefficient and the critical temperature suggests a universal mechanism underlying T-linear resistivity and unconventional superconductivity.
Article
Materials Science, Multidisciplinary
Yipeng An, Juncai Chen, Zhengxuan Wang, Jie Li, Shijing Gong, Chunlan Ma, Tianxing Wang, Zhaoyong Jiao, Ruqian Wu, Jiangping Hu, Wuming Liu
Summary: In this study, a new kagome magnesium triboride (MgB3) superconductor is predicted, with a calculated critical temperature of about 12.2 K and 15.4 K under external stress, which is potentially the highest among the reported diverse kagome-type superconductors. Various exotic physical properties of the system, including van Hove singularity, flat-band, multiple Dirac points, and nontrivial topology, are revealed. The topological and nodal superconducting nature of MgB3 is unveiled using a recently developed symmetry indicators method. This study suggests that MgB3 can serve as a new platform to explore exotic physics in the kagome structure and search for more superconductors and topological materials with XY3-type kagome lattice.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ying Zhou, Long Chen, Yuxin Wang, Jinfeng Zhu, Zhongnan Guo, Chen Liu, Zhiying Guo, ChinWei Wang, Han Zhang, Yulong Wang, Ke Liao, Youting Song, Jia-ou Wang, Dongliang Chen, Jie Ma, Jiangping Hu, Gang Wang
Summary: A new series of compounds, ANi5Bi5.6+delta (where A = K, Rb, and Cs), have been discovered with a quasi-one-dimensional (Q1D) [Ni5Bi5.6+delta]- double-walled column and a coaxial inner one-dimensional Bi atomic chain. The compounds exhibit metallic behaviors with strong electron correlation, and the Sommerfeld coefficient is enhanced with the increasing cationic radius. The substitution of Ni for Mn in ANi5Bi5.6+delta results in enhanced intercolumn distances and strong diamagnetic susceptibilities.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Yi Zhang, Yuhao Gu, Hongming Weng, Kun Jiang, Jiangping Hu
Summary: We investigate the strong electron-electron correlation effects in two-dimensional van der Waals materials Nb3X8 (X = Cl, Br, I). The monolayers Nb3X8 are close to the strong correlation limit and can be described by a half-filled single band Hubbard model with U/W ratio approximating to 5-10. Mott and magnetic transitions are calculated using the slave boson mean-field theory, and a dx2-y2 + idxy superconducting pairing instability is found upon doping the Mott state. A tunable bilayer Hubbard system is also constructed for two sliding Nb3X8 layers, showing a crossover between band insulator and Mott insulator.
Article
Materials Science, Multidisciplinary
Kun Jiang, Ziyue Qi, Hongming Weng, Jiangping Hu
Summary: In this study, we examine the properties of obstructed atomic insulators under correlation and find that the obstruction properties persist even at high correlation levels. This suggests that the obstructed atomic insulator phase can transition to its Mott phase seamlessly without undergoing a Mott transition.
Article
Materials Science, Multidisciplinary
Yuhao Gu, Yi Zhang, Xilin Feng, Kun Jiang, Jiangping Hu
Summary: This study reveals that the superconducting gap structures in transition-metal-based kagome metals are caused by the coexistence of time-reversal symmetry breaking and conventional fully gapped superconductivity. The symmetry protects the edge states that arise on the domains of lattice symmetry breaking order to remain seamless in proximity to conventional pairing.
