Layered kagome metals AV3Sb5 (A=K, Rb, Cs) exhibit diverse correlated electron phenomena. It includes charge density wave formation and superconductivity the pairing symmetry of which, however, is controversial due to contradictory experimental evidence. Through calculations based on real-space lattice models at the mean-field level, we investigate the vortex and surface spectra of all competitive pairing propensities suggested for AV3Sb5 from a weak coupling analysis of unconventional superconductivity. Chiral p-wave pairing emerges as the only option to host Majorana bound states in the vortex core. We find chiral edge states for both p-wave and d-wave pairing, along with flat Andreev surface bound states for f -wave pairing. Our results expand the fingerprint of superconducting pairing, and thus will contribute to resolving the nature of superconductivity in AV3Sb5.
Time-Reversal Symmetry Breaking Superconducting State and Collective Modes in Kagome Superconductors
Capital Normal University（首都师范大学）；Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences（中国科学院大学理论科学研究所）；Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所北京凝聚态物理国家研究中心）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）
Superconductivity from repulsive interactions on the kagome lattice
层状钒基可果美金属$A$ V $_3$ Sb $_5$（$A$：K，Rb，Cs）中超导性的发现为不断增长的可能的非常规超导体类别增加了一个新的材料家族。然而，这些材料中超导配对的性质仍然难以捉摸。基于自旋和电荷涨落介导的库珀对，我们对可果美晶格上的主要超导不稳定性进行了微观理论研究。所应用的方法包括现场和最近邻排斥库仑相互作用的影响。在上部van Hove填充附近--与$A$ V $_3$ Sb $_5$材料相关--我们发现了一个丰富的相图，其中有几个配对对称性接近简并。特别是，虽然相当一部分的相图被占据的自旋单态序参量转换为二维不可约的表示的点群，几个节点的自旋三重态配对状态保持竞争力。我们计算的领导超导不稳定性的层次结构的带和相互作用参数的依赖性，并确定详细的动量依赖所产生的首选的间隙结构。至关重要的是，对于中等值的相互作用参数，个别配对状态强烈依赖于动量和费米表面上表现出多个节点。我们讨论了这些超导能隙结构的性质，根据最近的实验发展的$A$ V $_3$ Sb $_5$材料。
Observation of Fermi-surface-dependent anisotropic Cooper pairing in kagome superconductor CsV3Sb5
The University of Tokyo（东京大学）；Beijing Institute of Technology（北京理工大学）；Southern University of Science and Technology（南方科技大学）；Chinese Academy of Sciences（中国科学院）；Yangtze Delta Region Academy of Beijing Institute of Technology（北京理工大学长三角研究院）
Topological pair density waves in kagome superconductors
Southern University of Science and Technology（南方科技大学）；Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area（粤港澳大湾区量子科学中心）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；University of Zurich（苏黎世大学）；The University of Tokyo（东京大学）
Phase-sensitive evidence for pair density waves in a kagome superconductor
Southern University of Science and Technology（南方科技大学）；High Magnetic Field Laboratory of Chinese Academy of Sciences（中国科学院合肥物质科学研究院强磁场科学中心）；Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area（粤港澳大湾区量子科学中心）；Johns Hopkins University（约翰斯·霍普金斯大学）；The University of Tokyo（东京大学）；Peking University（北京大学）；Paul Scherrer Institute（保罗谢尔研究所）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；Nanjing University（南京大学）；University of Wurzburg（维尔茨堡大学）；ETH Zürich（苏黎世联邦理工学院）
A Strongly Anisotropic Superconducting Gap in the Kagome Superconductor CsV$_3$Sb$_5$: A Study of Directional Point-Contact Andreev Reflection Spectroscopy
Switchable chiral 2x2 pair density wave in pure CsV3Sb5
Southern University of Science and Technology（南方科技大学）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area（粤港澳大湾区量子科学中心）；Beijing Institute of Technology（北京理工大学）
Thickness-driven crossover from conventional to chiral nonreciprocal superconductivity in kagome metal CsV3Sb5
National University of Singapore（新加坡国立大学）；Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理研究所）；The Chinese University of Hong Kong（香港中文大学）；Research Center for Electronic and Optical Materials（电子与光学材料研究中心）；Research Center for Materials Nanoarchitectonics（材料纳米架构研究中心）；State Key Laboratory of Quantum Information Technologies and Materials（量子信息技术与材料国家重点实验室）；Hunan University（湖南大学）
Signatures of spin-polarized p-wave superconductivity in the kagome material RbV$_3$Sb$_5$
International Quantum Academy（国际量子学院）；Hong Kong University of Science and Technology（香港科技大学）；Southern University of Science and Technology（南方科技大学）；Nankai University（南开大学）；Peking University（北京大学）
Pseudo-spin-polarized topological superconductivity in kagome RbV$_3$Sb$_5$
Hong Kong University of Science and Technology（香港科技大学）；International Quantum Academy, and Shenzhen Branch, Hefei National Laboratory（国际量子学院合肥国家实验室深圳分院）
Direct Evidence of Unconventional Superconductivity in Doped Kagome system RV$_3$Sb$_5$
University of Illinois at Urbana-Champaign（伊利诺伊大学厄巴纳-香槟分校）；Karlsruhe Institute of Technology（卡尔斯鲁厄理工学院）；University of California Santa Barbara（加州大学圣塔芭芭拉分校）
Fermi-surface diagnosis for topological superconductivity with $s$-wave-like pairing symmetries
Hong Kong University of Science and Technology（香港科技大学）；Yukawa Institute for Theoretical Physics, Kyoto University（京都大学汤川理论物理研究所）；Kavli Institute for Theoretical Sciences, Chinese Academy of Sciences（中国科学院理论科学卡弗里研究所）；RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS), RIKEN（理研跨学科理论与数学科学中心(iTHEMS)）
Discovery of parity-violating chiral polar-nematic charge density wave and superconductivity in kagome metals
Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；Hefei National Laboratory（合肥国家实验室）；Department of Physics, Boston College（波士顿学院物理系）；Department of Applied Physics, The Hong Kong Polytechnic University（香港理工大学应用物理系）；Department of Chemistry, National University of Singapore（新加坡国立大学化学系）
