Identifying s-wave pairing symmetry in single-layer FeSe from topologically trivial edge states

doi:10.1038/s41467-023-40931-5

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	Identifying s-wave pairing symmetry in single-layer FeSe from topologically trivial edge states
	Wei, Zhongxu ; Qin, Shengshan 2,3,4; Ding, Cui ; Wu, Xianxin 6; Hu, Jiangping 3,4,7,8; Sun, Yu-Jie ; Wang, Lili ; Xue, Qi-Kun
刊名	NATURE COMMUNICATIONS
	2023
卷号	14 期号:1 页码:5302
关键词	SUPERCONDUCTIVITY
DOI	10.1038/s41467-023-40931-5
英文摘要	Determining the pairing symmetry of single-layer FeSe on SrTiO3 is the key to understanding the enhanced pairing mechanism. It also guides the search for superconductors with high transition temperatures. Despite considerable efforts, it remains controversial whether the symmetry is the sign-preserving s- or the sign-changing s(+/-)-wave. Here, we investigate the pairing symmetry of single-layer FeSe from a topological point of view. Using low-temperature scanning tunneling microscopy/spectroscopy, we systematically characterize the superconducting states at edges and corners of single-layer FeSe. The tunneling spectra collected at edges and corners show a full energy gap and a substantial dip, respectively, suggesting the absence of topologically non-trivial edge and corner modes. According to our theoretical calculations, these spectroscopic features can be considered as strong evidence for the sign-preserving s-wave pairing in single-layer FeSe.
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/311006/28001]
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.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China 2.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China 3.Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China 4.Univ Chinese Acad Sci, Kavli Inst Theoret Sci, Beijing 100049, Peoples R China 5.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100049, Peoples R China 6.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China 7.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 8.Chinese Acad Sci, Beijing Natl Res Ctr Condensed Matter Phys, Beijing 100190, Peoples R China 9.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 10.Quantum Sci Ctr Guangdong Hong Kong Macao Greater, Macao Greater Bay Area, Hong Kong 518045, Peoples R China
推荐引用方式 GB/T 7714	Wei, Zhongxu,Qin, Shengshan,Ding, Cui,et al. Identifying s-wave pairing symmetry in single-layer FeSe from topologically trivial edge states[J]. NATURE COMMUNICATIONS,2023,14(1):5302.
APA	Wei, Zhongxu.,Qin, Shengshan.,Ding, Cui.,Wu, Xianxin.,Hu, Jiangping.,...&Xue, Qi-Kun.(2023).Identifying s-wave pairing symmetry in single-layer FeSe from topologically trivial edge states.NATURE COMMUNICATIONS,14(1),5302.
MLA	Wei, Zhongxu,et al."Identifying s-wave pairing symmetry in single-layer FeSe from topologically trivial edge states".NATURE COMMUNICATIONS 14.1(2023):5302.