Chern Fermi pocket, topological pair density wave, and charge-4e and charge-6e superconductivity in kagome superconductors
文献类型：期刊论文
| 作者 | Zhou, Sen1,4 ; Wang, Ziqiang2
|
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2022 |
| 卷号 | 13期号:1页码:7288 |
| 关键词 | FLUX PHASE ORDER |
| DOI | 10.1038/s41467-022-34832-2 |
| 英文摘要 | The recent discovery of novel charge density wave (CDW) and pair density wave (PDW) in kagome superconductors (SC) AV(3)Sb(5) motivates theoretical study of these phenomena. Here, the authors propose that the CDW state is an orbital Chern metal, leading to a SC state with a chiral PDW, the melting of which leads to vestigial electronic orders including charge-4e and 6e SC. The recent discovery of novel charge density wave (CDW) and pair density wave (PDW) in kagome lattice superconductors AV(3)Sb(5) (A = K, Rb, Cs) hints at unexpected time-reversal symmetry breaking correlated and topological states whose physical origin and broader implications are not understood. Here, we make conceptual advances toward a mechanism behind the striking observations and new predictions for novel macroscopic phase coherent quantum states. We show that the metallic CDW state with circulating loop currents is a doped orbital Chern insulator near van Hove filling. The emergent Chern Fermi pockets (CFPs) carry concentrated Berry curvature and orbital magnetic moment. We find that the pairing of electrons on the CFPs leads to a superconducting state with an emergent vortex-antivortex lattice and the formation of a complex triple-Q PDW. A plethora of correlated and topological states emerge, including a never-before-encountered chiral topological PDW superconductor, a loop-current pseudogap phase, and vestigial charge-4e and charge-6e superconductivity in staged melting of the vortex-antivortex lattice and hexatic liquid crystal. Our findings reveal previously unknown nature of the superconducting state of a current-carrying Chern metal, with broad implications for correlated and topological materials. |
| 学科主题 | Science & Technology - Other Topics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27696]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100049, Peoples R China 3.Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Sen,Wang, Ziqiang. Chern Fermi pocket, topological pair density wave, and charge-4e and charge-6e superconductivity in kagome superconductors[J]. NATURE COMMUNICATIONS,2022,13(1):7288. |
| APA | Zhou, Sen,&Wang, Ziqiang.(2022).Chern Fermi pocket, topological pair density wave, and charge-4e and charge-6e superconductivity in kagome superconductors.NATURE COMMUNICATIONS,13(1),7288. |
| MLA | Zhou, Sen,et al."Chern Fermi pocket, topological pair density wave, and charge-4e and charge-6e superconductivity in kagome superconductors".NATURE COMMUNICATIONS 13.1(2022):7288. |
入库方式： OAI收割
来源：理论物理研究所
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