Evidence for time-reversal symmetry-breaking kagome superconductivity

Deng, Hanbin1; Liu, Guowei1; Guguchia, Z.2; Yang, Tianyu1; Liu, Jinjin3,4; Wang, Zhiwei3,4,5; Xie, Yaofeng6,7; Shao, Sen8; Ma, Haiyang9; Liege, William10; Bourdarot, Frederic11; Yan, Xiao-Yu1; Qin, Hailang9; Mielke, C.2; Khasanov, R.2; Luetkens, H.2; Wu, Xianxin12; Chang, Guoqing8; Liu, Jianpeng13; Christensen, Morten Holm14; Kreisel, Andreas14; Andersen, Brian Moller14; Huang, Wen15; Zhao, Yue1; Bourges, Philippe10; Yao, Yugui3,4,5; Dai, Pengcheng6,7; Yin, Jia-Xin1,9

2024-08-01

10.1038/s41563-024-01995-w

NATURE MATERIALS   影响因子和分区

1476-1122

1476-4660

["Superconductivity and magnetism are often antagonistic in quantum matter, although their intertwining has long been considered in frustrated-lattice systems. Here we utilize scanning tunnelling microscopy and muon spin resonance to demonstrate time-reversal symmetry-breaking superconductivity in kagome metal Cs(V, Ta)3Sb5, where the Cooper pairing exhibits magnetism and is modulated by it. In the magnetic channel, we observe spontaneous internal magnetism in a fully gapped superconducting state. Under the perturbation of inverse magnetic fields, we detect a time-reversal asymmetrical interference of Bogoliubov quasi-particles at a circular vector. At this vector, the pairing gap spontaneously modulates, which is distinct from pair density waves occurring at a point vector and consistent with the theoretical proposal of an unusual interference effect under time-reversal symmetry breaking. The correlation between internal magnetism, Bogoliubov quasi-particles and pairing modulation provides a chain of experimental indications for time-reversal symmetry-breaking kagome superconductivity.","The authors use scanning tunnelling microscopy and muon spin resonance to demonstrate time-reversal symmetry-breaking superconductivity in Cs(V, Ta)3Sb5. The Cooper pairing in this state exhibits magnetism and is modulated by it."]

SCI ; EI

英语

第一 ; 通讯

National Key R&D Program of China["2023YFA1407300","2023YFF0718403","2022YFA1403400","2020YFA0308800"] ; National Science Foundation of China["12374060","12321004","12234003"] ; Guangdong Provincial Quantum Science Strategic Initiative[GDZX2201001] ; Beijing Natural Science Foundation[Z210006] ; Beijing National Laboratory for Condensed Matter Physics[2023BNLCMPKF007] ; National Research Foundation, Singapore, under its Fellowship Award[NRF-NRFF13-2021-0010] ; Singapore Ministry of Education (MOE) AcRF Tier 2 grant[MOE-T2EP50222-0014] ; US DOE, BES[DE-SC0012311] ; Swiss National Science Foundation (SNSF) through SNSF Starting Grant[TMSGI2_211750]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001302648900001

NATURE PORTFOLIO

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Peoples R China
2.Paul Scherrer Inst, Lab Muon Spin Spect, Villigen, Aargau, Switzerland
3.Beijing Inst Technol, Ctr Quantum Phys, Sch Phys, Key Lab Adv Optoelect Quantum Architecture & Measu, Beijing, Peoples R China
4.Beijing Inst Technol, Beijing Key Lab Nanophoton & Ultrafine Optoelect S, Beijing, Peoples R China
5.Beijing Inst Technol, Int Ctr Quantum Mat, Zhuhai, Peoples R China
6.Rice Univ, Dept Phys & Astron, Houston, TX USA
7.Rice Univ, Smalley Curl Inst, Houston, TX USA
8.Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore, Singapore
9.Quantum Sci Ctr Guangdong Hong Kong Macao Greater, Hong Kong, Peoples R China
10.Univ Paris Saclay, CNRS CEA, Lab Leon Brillouin, Gif Sur Yvette, France
11.Univ Grenoble Alpes, MEM MDN, CEA, INAC, Grenoble, France
12.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing, Peoples R China
13.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai, Peoples R China
14.Univ Copenhagen, Niels Bohr Inst, Copenhagen, Denmark
15.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen, Peoples R China

Deng, Hanbin,Liu, Guowei,Guguchia, Z.,et al. Evidence for time-reversal symmetry-breaking kagome superconductivity[J]. NATURE MATERIALS,2024.

Deng, Hanbin.,Liu, Guowei.,Guguchia, Z..,Yang, Tianyu.,Liu, Jinjin.,...&Yin, Jia-Xin.(2024).Evidence for time-reversal symmetry-breaking kagome superconductivity.NATURE MATERIALS.

Deng, Hanbin,et al."Evidence for time-reversal symmetry-breaking kagome superconductivity".NATURE MATERIALS (2024).