We systematically measure the superconducting (SC) and mixed state properties of high-quality CsV3Sb5 single crystals with Tc ~ 3.5 K. We find that the upper critical field Hc2(T) exhibits a large anisotropic ratio of Hc2^(ab)/Hc2^(c) ~ 9 at zero temperature and fitting its temperature dependence requires a minimum two-band effective model. Moreover, the ratio of the lower critical field, Hc1^(ab)/Hc1^(c), is also found to be larger than 1, which indicates that the in-plane energy dispersion is strongly renormalized near Fermi energy. Both Hc1(T) and SC diamagnetic signal are found to change little initially below Tc ~ 3.5 K and then to increase abruptly upon cooling to a characteristic temperature of ~2.8 K. Furthermore, we identify a two-fold anisotropy of in-plane angular-dependent magnetoresistance in the mixed state. Interestingly, we find that, below the same characteristic T ~ 2.8 K, the orientation of this two-fold anisotropy displays a peculiar twist by an angle of 60o characteristic of the Kagome geometry. Our results suggest an intriguing superconducting state emerging in the complex environment of Kagome lattice, which, at least, is partially driven by electron-electron correlation.
A Strongly Anisotropic Superconducting Gap in the Kagome Superconductor CsV$_3$Sb$_5$: A Study of Directional Point-Contact Andreev Reflection Spectroscopy
Spatially anisotropic Kondo resonance coupled with the superconducting gap in a kagome metal
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）；Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, School of Physics, Renmin University of China（中国人民大学物理学院）；Department of Physics, Boston College（波士顿学院物理系）
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）
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）
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）
Binary kagome superconducting candidates hosting topological electronic states
Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；Peng Huanwu Collaborative Center for Research and Education, Beihang University（北京航空航天大学彭恒武理论研究中心）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences（中国科学院大学科维理理论科学研究所）
The possible frustrated superconductivity in the kagome superconductors
Zhejiang University of Science and Technology（浙江科技学院）；The University of Hong Kong（香港大学）；Nanjing University（南京大学）；Hong Kong Branch for Quantum Science Center of Guangdong-Hong Kong-Macau GBA, China（粤港澳大湾区量子科学中心香港分部）
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。
Three-dimensional charge density wave and robust zero-bias conductance peak inside the superconducting vortex core of a kagome superconductor CsV$_3$Sb$_5$
Superconductivity and Electron Correlations in Kagome Metal LuOs3B2
Southwest Jiaotong University（西南交通大学）；Tsung-Dao Lee Institute, Shanghai Jiao Tong University（上海交大李政道研究所）；Shanghai Jiao Tong University（上海交通大学）；Zhejiang University（浙江大学）；Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering（福建省先进强磁场超导材料与工程协同创新中心）；Fujian Normal University（福建师范大学）
Distinct Surface and Bulk Superconductivity in the Kagome Superconductor SrSn$_3$
Tsinghua University（清华大学）；Southwest University（西南大学）；Frontier Science Center for Quantum Information（量子信息前沿科学中心）；Southern University of Science and Technology（南方科技大学）；Beijing Academy of Quantum Information Sciences（北京量子信息科学研究院）；Hefei National Laboratory（合肥国家实验室）
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）
