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Distinguishing Majorana zero modes from trivial defect states in an iron-based superconductor
Dongfei Wang, Jon Ortuzar, Freek Massee +5
Majorana zero modes, which obey non-Abelian exchange statistics, are promising candidates for topological quantum computation due to their robustness against environmental perturba…
A unique van Hove singularity in kagome superconductor CsVTaSb with enhanced superconductivity
Yang Luo, Yulei Han, Jinjin Liu +23
Van Hove singularity (VHS) has been considered as a driving source for unconventional superconductivity. A VHS in two-dimensional (2D) materials consists of a saddle point connecti…
Violation of Emergent Rotational Symmetry in the Hexagonal Kagome Superconductor CsV3Sb5
Kazumi Fukushima, Keito Obata, Soichiro Yamane +6
Superconductivity is caused by electron pairs that are canonically isotropic, whereas some exotic superconductors are known to exhibit non-trivial anisotropy stemming from unconven…
Effects of Nb Doping on the Charge-Density Wave and Electronic Correlations in the Kagome Metal Cs(VNb)Sb
Xiaoxiang Zhou, Yongkai Li, Zhe Liu +5
The transport and optical properties of the Nb-doped Cs(VNb)Sb with x = 0.03 and 0.07 have been investigated and compared with those of the undoped CsV$_{…
Nodeless electron pairing in CsVSb-derived kagome superconductors
Yigui Zhong, Jinjin Liu, Xianxin Wu +19
The newly discovered kagome superconductors represent a promising platform for investigating the interplay between band topology, electronic order, and lattice geometry. Despite ex…
Two-fold symmetric superconductivity in the kagome superconductor RbV3Sb5
Shuo Wang, Ze-Nan Wu, Jing-Zhi Fang +7
The recently discovered kagome superconductors offer a promising platform for investigating intertwined orders and novel states, including topology, superconductivity, charge densi…
Surface-termination-dependent electronic states in kagome superconductors AV3Sb5 (A = K, Rb, Cs) studied by micro-ARPES
Takemi Kato, Yongkai Li, Min Liu +9
Recently discovered kagome superconductors AV3Sb5 (A = K, Rb, Cs) exhibit exotic bulk and surface physical properties such as charge-density wave (CDW) and chirality, whereas their…
Pressure-Induced Superconductivity in Topological Heterostructure (PbSe)5(Bi2Se3)6
Cuiying Pei, Peng Zhu, Bingtan Li +16
Recently, the natural heterostructure of (PbSe)5(Bi2Se3)6 has been theoretically predicted and experimentally confirmed as a topological insulator. In this work, we induce supercon…
Pressured-induced superconductivity extending across the topological phase transition in thallium-based topological materials TlBi(S1-xSex)2
Cuiying Pei, Peihao Huang, Peng Zhu +15
The coexistence of superconductivity and topology holds the potential to realize exotic quantum states of matter. Here we report that superconductivity induced by high pressure in…
Electronic Correlations and Evolution of the Charge-Density Wave in the Kagome Metals VSb ( = K, Rb, Cs)
Xiaoxiang Zhou, Yongkai Li, Xinwei Fan +7
The kagome metals VSb ( = K, Rb, Cs) have attracted enormous interest as they exhibit intertwined charge-density wave (CDW) and superconductivity. The alkali-meta…
Three-dimensional energy gap and origin of charge-density wave in kagome superconductor KV3Sb5
Takemi Kato, Yongkai Li, Tappei Kawakami +8
Kagome lattices offer a fertile ground to explore exotic quantum phenomena associated with electron correlation and band topology. The recent discovery of superconductivity coexist…
Fermiology and Origin of Tc Enhancement in a Kagome Superconductor Cs(V1-xNbx)3Sb5
Takemi Kato, Yongkai Li, Kosuke Nakayama +9
Kagome metals AV3Sb5 (A = K, Rb, and Cs) exhibit a characteristic superconducting ground state coexisting with charge-density wave (CDW), whereas the mechanisms of the superconduct…
Carrier Injection and Manipulation of Charge-Density Wave in Kagome Superconductor CsV3Sb5
Kosuke Nakayama, Yongkai Li, Takemi Kato +5
Kagome metals AV3Sb5 (A = K, Rb, and Cs) exhibit a unique superconducting ground state coexisting with charge-density wave (CDW), whereas how these characteristics are affected by…
Tuning the competition between superconductivity and charge order in kagome superconductor Cs(V1-xNbx)3Sb5
Yongkai Li, Qing Li, Xinwei Fan +10
The recently discovered coexistence of superconductivity and charge density wave order in the kagome systems AV3Sb5 (A = K, Rb, Cs) has stimulated enormous interest. According to t…
Twofold symmetry of -axis resistivity in topological kagome superconductor CsVSb with in-plane rotating magnetic field
Ying Xiang, Qing Li, Yongkai Li +5
In transition metal compounds, due to the interplay of charge, spin, lattice and orbital degrees of freedom, many intertwined orders exist with close energies. One of the commonly…
Multiple Energy Scales and Anisotropic Energy Gap in the Charge-Density-Wave Phase of Kagome Superconductor CsV3Sb5
Kosuke Nakayama, Yongkai Li, Takemi Kato +5
Kagome metals AV3Sb5 (A = K, Rb, and Cs) exhibit superconductivity at 0.9-2.5 K and charge-density wave (CDW) at 78-103 K. Key electronic states associated with the CDW and superco…
Origin of the Charge Density Wave in the Kagome Metal CsVSb as Revealed by Optical Spectroscopy
Xiaoxiang Zhou, Yongkai Li, Xinwei Fan +5
We report on a detailed study of the optical properties of CsVSb at a large number of temperatures above and below the charge-density-wave (CDW) transition. Above the C…
Hole-Doped Room-Temperature Superconductivity in HSZ (Z=C, Si)
Yanfeng Ge, Fan Zhang, Ranga P. Dias +2
We examine the effects of the low-level substitution of S atoms by C and Si atoms on the superconductivity of HS with the structure at megabar pressure. The hole d…
Possible Superconductivity Approaching Ice Point
Yanfeng Ge, Fan Zhang, Yugui Yao
Recently BCS superconductivity at 203 K has been discovery in a highly compressed hydrogen sulfide. We use first-principles calculations to systematically examine the effects of pa…
Itinerant Ferromagnetism and Superconductivity in Doped Bilayer Silicene
Li-Da Zhang, Fan Yang, Yugui Yao
We study the electronic instabilities of doped bilayer silicene using the random phase approximation. In contrast to the singlet superconductivity at the low doping region,…
Possible Electric-Field-Induced Superconducting States in Doped Silicene
Li-Da Zhang, Fan Yang, Yugui Yao
Silicene has been synthesized recently, with experimental evidence showing possible superconductivity in the doped case. The noncoplanar low-buckled structure of this material insp…
Phonon-mediated Superconductivity in Silicene
Wenhui Wan, Yanfeng Ge, Fan Yang +1
We predict that electron-doped silicene is a good two-dimensional electron-phonon superconductor under biaxial tensile strain by first-principles calculations within rigid band app…
Abrupt enhancement of non-centrosymmetry and appearance of the spin-triplet superconducting state in Li_2(Pd_{1-x}Pt_{x})_3B beyond x=0.8
S. Harada, J. J. Zhou, Y. G. Yao +2
We report synthesis, ^{195}Pt, ^{11}B and ^{7}Li NMR measurements, and first-principle band calculation for non-centrosymmetric superconductors Li_{2}(Pd_{1-x}Pt_{x})_{3}B (x=0, 0.…
d+id' Chiral Superconductivity in Bilayer Silicene
Feng Liu, Cheng-Cheng Liu, Kehui Wu +2
We investigate the structure and physical properties of the undoped bilayer silicene through first-principles calculations and find the system is intrinsically metallic with sizabl…