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Chiral kagome superconductivity modulations with residual Fermi arcs

文献类型：期刊论文

作者Deng, Hanbin2; Qin, Hailang3; Liu, Guowei2; Yang, Tianyu2; Fu, Ruiqing4; Zhang, Zhongyi1; Wu, Xianxin4; Wang, Zhiwei5,6; Shi, Youguo7,8,9,10; Liu, Jinjin5,6
刊名NATURE
出版日期2024-08-22
卷号632
ISSN号0028-0836
DOI10.1038/s41586-024-07798-y
通讯作者Wu, Xianxin(xxwu@itp.ac.cn) ; Wang, Zhiwei(zhiweiwang@bit.edu.cn) ; Shi, Youguo(ygshi@iphy.ac.cn) ; Yin, Jia-Xin(yinjx@sustech.edu.cn)
英文摘要Superconductivity involving finite-momentum pairing(1) can lead to spatial-gap and pair-density modulations, as well as Bogoliubov Fermi states within the superconducting gap. However, the experimental realization of their intertwined relations has been challenging. Here we detect chiral kagome superconductivity modulations with residual Fermi arcs in KV3Sb5 and CsV3Sb5 using normal and Josephson scanning tunnelling microscopy down to 30 millikelvin with a resolved electronic energy difference at the microelectronvolt level. We observe a U-shaped superconducting gap with flat residual in-gap states. This gap shows chiral 2a x 2a spatial modulations with magnetic-field-tunable chirality, which align with the chiral 2a x 2a pair-density modulations observed through Josephson tunnelling. These findings demonstrate a chiral pair density wave (PDW) that breaks time-reversal symmetry. Quasiparticle interference imaging of the in-gap zero-energy states reveals segmented arcs, with high-temperature data linking them to parts of the reconstructed vanadium d-orbital states within the charge order. The detected residual Fermi arcs can be explained by the partial suppression of these d-orbital states through an interorbital 2a x 2a PDW and thus serve as candidate Bogoliubov Fermi states. In addition, we differentiate the observed PDW order from impurity-induced gap modulations. Our observations not only uncover a chiral PDW order with orbital selectivity but also show the fundamental space-momentum correspondence inherent in finite-momentum-paired superconductivity.
WOS关键词PAIR-DENSITY-WAVE ; STATE ; ORDER
资助项目National Key R&D Program of China[2023YFA1407300] ; National Key R&D Program of China[2023YFF0718403] ; National Key R&D Program of China[2021YFA1401500] ; National Key R&D Program of China[2022YFA1403400] ; National Key R&D Program of China[2020YFA0308800] ; National Key R&D Program of China[2022YFA1403800] ; National Science Foundation of China[12374060] ; National Science Foundation of China[12374147] ; National Science Foundation of China[92365023] ; National Science Foundation of China[12047503] ; National Science Foundation of China[12374153] ; National Science Foundation of China[12274154] ; Guangdong Provincial Quantum Science Strategic Initiative[GDZX2201001] ; Beijing Natural Science Foundation[Z210006] ; Beijing National Laboratory for Condensed Matter Physics[2023BNLCMPKF007] ; HPC Platform of Huazhong University of Science and Technology ; National Research Foundation, Singapore, under its Fellowship Award[NRF-NRFF13-2021-0010] ; Agency for Science, Technology and Research (A*STAR) under its Manufacturing, Trade and Connectivity (MTC) Individual Research Grant (IRG)[M23M6c0100] ; Singapore Ministry of Education (MOE) AcRF Tier 2[MOE-T2EP50222-0014] ; Sustech ; Nanyang Assistant Professorship grant (NTU-SUG) ; NSFC[12321004] ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)[258499086 - SFB 1170] ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)[449872909] ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)[390858490 - EXC 2147] ; Swiss National Science Foundation (SNSF) through SNSF Starting Grant[TMSGI2_211750] ; Swiss National Science Foundation (SNSF) through Division II[207908] ; Swiss National Science Foundation[200021E_198011] ; Swiss National Science Foundation[FOR 5249] ; Swiss National Science Foundation[TMCG-2_213805]
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:001300596600002
出版者NATURE PORTFOLIO
资助机构National Key R&D Program of China ; National Science Foundation of China ; Guangdong Provincial Quantum Science Strategic Initiative ; Beijing Natural Science Foundation ; Beijing National Laboratory for Condensed Matter Physics ; HPC Platform of Huazhong University of Science and Technology ; National Research Foundation, Singapore, under its Fellowship Award ; Agency for Science, Technology and Research (A*STAR) under its Manufacturing, Trade and Connectivity (MTC) Individual Research Grant (IRG) ; Singapore Ministry of Education (MOE) AcRF Tier 2 ; Sustech ; Nanyang Assistant Professorship grant (NTU-SUG) ; NSFC ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Swiss National Science Foundation (SNSF) through SNSF Starting Grant ; Swiss National Science Foundation (SNSF) through Division II ; Swiss National Science Foundation
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135040]  
专题中国科学院合肥物质科学研究院
通讯作者Wu, Xianxin; Wang, Zhiwei; Shi, Youguo; Yin, Jia-Xin
作者单位1.Hong Kong Univ Sci & Technol, Dept Phys, Clear Water Bay, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Peoples R China
3.Quantum Sci Ctr Guangdong Hong Kong Macao Greater, Shenzhen, Peoples R China
4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing, Peoples R China
5.Beijing Inst Technol, Ctr Quantum Phys, Sch Phys, Key Lab Adv Optoelect Quantum Architecture & Measu, Beijing, Peoples R China
6.Beijing Inst Technol, Beijing Key Lab Nanophoton & Ultrafine Optoelect S, Beijing, Peoples R China
7.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing, Peoples R China
8.Chinese Acad Sci, Inst Phys, Beijing, Peoples R China
9.Univ Chinese Acad Sci, Beijing, Peoples R China
10.Songshan Lake Mat Lab, Dongguan, Peoples R China
推荐引用方式
GB/T 7714		 Deng, Hanbin,Qin, Hailang,Liu, Guowei,et al. Chiral kagome superconductivity modulations with residual Fermi arcs[J]. NATURE,2024,632.
APA Deng, Hanbin.,Qin, Hailang.,Liu, Guowei.,Yang, Tianyu.,Fu, Ruiqing.,...&Yin, Jia-Xin.(2024).Chiral kagome superconductivity modulations with residual Fermi arcs.NATURE,632.
MLA Deng, Hanbin,et al."Chiral kagome superconductivity modulations with residual Fermi arcs".NATURE 632(2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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