Knowledge Management System of Institute of Theoretical Physics, CAS
Zhou, Sen1,2 ; Wang, Ziqiang3
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| Chern Fermi pocket, topological pair density wave, and charge-4e and charge-6e superconductivity in kagome superconductors | |
| Source Publication | NATURE COMMUNICATIONS
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| Language | 英语 |
| Keyword | FLUX PHASE ORDER |
| Abstract | 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. |
| 2022 | |
| Volume | 13Issue:1Pages:7288 |
| Cooperation Status | 国际 |
| Subject Area | Science & Technology - Other Topics |
| MOST Discipline Catalogue | Multidisciplinary Sciences |
| DOI | 10.1038/s41467-022-34832-2 |
| Indexed By | SCIE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/27696 |
| Collection | SCI期刊论文 |
| Affiliation | 1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100049, Peoples R China 4.Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Chern Fermi pocket, （2324KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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