Nodeless electron pairing in CsV3Sb5-derived kagome superconductors

doi:10.1038/s41586-023-05907-x

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	Nodeless electron pairing in CsV3Sb5-derived kagome superconductors
	Zhong, Yigui ; Liu, Jinjin 1,2; Wu, Xianxin 3; Guguchia, Zurab 4; Yin, J. -x.; Mine, Akifumi ; Li, Yongkai 1,2,7; Najafzadeh, Sahand ; Das, Debarchan 4; Mielke, Charles 4
刊名	NATURE
	2023
卷号	617 期号:7961 页码:488+
关键词	CHARGE ORDER ENERGY GAPS
ISSN号	0028-0836
DOI	10.1038/s41586-023-05907-x
英文摘要	The newly discovered kagome superconductors represent a promising platform for investigating the interplay between band topology, electronic order and lattice geometry(1-9). Despite extensive research efforts on this system, the nature of the superconducting ground state remains elusive(10-17). In particular, consensus on the electron pairing symmetry has not been achieved so far(18-20), in part owing to the lack of a momentum-resolved measurement of the superconducting gap structure. Here we report the direct observation of a nodeless, nearly isotropic and orbital-independent superconducting gap in the momentum space of two exemplary CsV3Sb5-derived kagome superconductors-Cs(V0.93Nb0.07)(3)Sb-5 and Cs(V0.86Ta0.14)(3)Sb-5-using ultrahigh-resolution and low-temperature angle-resolved photoemission spectroscopy. Remarkably, such a gap structure is robust to the appearance or absence of charge order in the normal state, tuned by isovalent Nb/Ta substitutions of V. Our comprehensive characterizations of the superconducting gap provide indispensable information on the electron pairing symmetry of kagome superconductors, and advance our understanding of the superconductivity and intertwined electronic orders in quantum materials.
学科主题	Science & Technology - Other Topics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/28032]
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.Univ Tokyo, Inst Solid States Phys, Kashiwa, Japan 2.Beijing Inst Technol, Ctr Quantum Phys, Sch Phys, Key Lab Adv Optoelect Quantum Architecture & Measu, Beijing, Peoples R China 3.Beijing Inst Technol, Beijing Key Lab Nanophoton & Ultrafine Optoelect S, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing, Peoples R China 5.Paul Scherrer Inst, Lab Muon Spin Spect, Villigen, Switzerland 6.Yin, J. -x.] Southern Univ Sci & Technol, Dept Phys, Lab Quantum Emergence, Shenzhen, Peoples R China 7.Yin, J. -x.] Quantum Sci Ctr Guangdong Hong Kong Macao Greater, Hong Kong, Peoples R China 8.Yangtze Delta Reg Acad, Beijing Inst Technol, Mat Sci Ctr, Jiaxing, Peoples R China 9.Univ Chinese Acad Sci, Kavli Inst Theoret Sci, Beijing, Peoples R China 10.Univ Tokyo, Transscale Quantum Sci Inst, Tokyo, Japan
推荐引用方式 GB/T 7714	Zhong, Yigui,Liu, Jinjin,Wu, Xianxin,et al. Nodeless electron pairing in CsV3Sb5-derived kagome superconductors[J]. NATURE,2023,617(7961):488+.
APA	Zhong, Yigui.,Liu, Jinjin.,Wu, Xianxin.,Guguchia, Zurab.,Yin, J. -x..,...&Okazaki, Kozo.(2023).Nodeless electron pairing in CsV3Sb5-derived kagome superconductors.NATURE,617(7961),488+.
MLA	Zhong, Yigui,et al."Nodeless electron pairing in CsV3Sb5-derived kagome superconductors".NATURE 617.7961(2023):488+.