Spin-orbit-parity coupled superconductivity in atomically thin 2M-WS2

doi:10.1038/s41567-022-01812-8

	Spin-orbit-parity coupled superconductivity in atomically thin 2M-WS2
	Zhang, Enze 1,2,3; Xie, Ying-Ming 4; Fang, Yuqiang 5; Zhang, Jinglei 6; Xu, Xian 7; Zou, Yi-Chao 8,9; Leng, Pengliang 1,2,3; Gao, Xue-Jian 4; Zhang, Yong 6; Ai, Linfeng 1,2,3
刊名	NATURE PHYSICS
	2022-11-14
ISSN号	1745-2473
DOI	10.1038/s41567-022-01812-8
通讯作者	Yang, Jinshan(jyang@mail.sic.ac.cn) ; Huang, Fuqiang(Huangfq@mail.sic.ac.cn) ; Law, K. T.(Phlaw@ust.hk) ; Xiu, Faxian(Faxian@fudan.edu.cn)
英文摘要	A form of superconductivity where strong spin-orbit coupling combines with topological band inversions to produce strong robustness against magnetic fields is shown in a few-layer transition metal dichalcogenide. The investigation of two-dimensional atomically thin superconductors-especially those hosting topological states-attracts growing interest in condensed-matter physics. Here we report the observation of spin-orbit-parity coupled superconducting state in centrosymmetric atomically thin 2M-WS2, a material that has been predicted to exhibit topological band inversions. Our magnetotransport measurements show that the in-plane upper critical field not only exceeds the Pauli paramagnetic limit but also exhibits a strongly anisotropic two-fold symmetry in response to the in-plane magnetic field direction. Furthermore, tunnelling spectroscopy measurements conducted under high in-plane magnetic fields reveal that the superconducting gap possesses an anisotropic magnetic response along different in-plane magnetic field directions, and it persists much above the Pauli limit. Self-consistent mean-field calculations show that this unusual behaviour originates from the strong spin-orbit-parity coupling arising from the topological band inversion in 2M-WS2, which effectively pins the spin of states near the topological band crossing and gives rise to an anisotropic renormalization of the effect of external Zeeman fields. Our results identify the unconventional superconductivity in atomically thin 2M-WS2, which serves as a promising platform for exploring the interplay between superconductivity, topology and strong spin-orbit-parity coupling.
资助项目	National Key Research and Development Program of China[2017YFA0303302] ; National Key Research and Development Program of China[2018YFA0305601] ; National Natural Science Foundation of China[52225207] ; National Natural Science Foundation of China[52150103] ; National Natural Science Foundation of China[11934005] ; National Natural Science Foundation of China[11874116] ; National Natural Science Foundation of China[12122411] ; National Natural Science Foundation of China[U1932154] ; National Natural Science Foundation of China[12104517] ; Science and Technology Commission of Shanghai[19511120500] ; Shanghai Municipal Science and Technology Major Project[2019SHZDZX01] ; Program of Shanghai Academic/Technology Research Leader[20XD1400200] ; Shanghai Pilot Program for Basic Research-Fudan University[21TQ1400100(21TQ006)] ; Henry Royce Institute for Advanced Materials, through EPSRC[EP/R00661X/1] ; Henry Royce Institute for Advanced Materials, through EPSRC[EP/S019367/1] ; Henry Royce Institute for Advanced Materials, through EPSRC[EP/P025021/1] ; Henry Royce Institute for Advanced Materials, through EPSRC[EP/P025498/1] ; China Postdoctoral Innovative Talents Support Program[BX20190085] ; China Postdoctoral Innovative Talents Support Program[BX2021329] ; China Postdoctoral Science Foundation[2019M661331] ; Guangzhou Basic and Applied Basic Research Foundation[202201011074] ; Fundamental Research Funds for the Central Universities, Sun Yat-sen University[22qntd0101] ; European Research Council under the Horizon 2020 research and innovation programme[715502] ; Ministry of Science and Technology of China ; HKRGC[MOST20SC04] ; HKRGC[RFS2021-6S03] ; HKRGC[C6025-19G] ; HKRGC[AoE/P-701/20] ; HKRGC[16310219] ; HKRGC[16309718] ; HKRGC[16310520]
WOS关键词	ISING SUPERCONDUCTIVITY ; GROUND-STATE ; APPROXIMATION ; TRANSITION
WOS研究方向	Physics
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:000883265700005
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Science and Technology Commission of Shanghai ; Shanghai Municipal Science and Technology Major Project ; Program of Shanghai Academic/Technology Research Leader ; Shanghai Pilot Program for Basic Research-Fudan University ; Henry Royce Institute for Advanced Materials, through EPSRC ; China Postdoctoral Innovative Talents Support Program ; China Postdoctoral Science Foundation ; Guangzhou Basic and Applied Basic Research Foundation ; Fundamental Research Funds for the Central Universities, Sun Yat-sen University ; European Research Council under the Horizon 2020 research and innovation programme ; Ministry of Science and Technology of China ; HKRGC
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130403]
专题	中国科学院合肥物质科学研究院
通讯作者	Yang, Jinshan; Huang, Fuqiang; Law, K. T.; Xiu, Faxian
作者单位	1.Shanghai Qi Zhi Inst, Shanghai, Peoples R China 2.Fudan Univ, State Key Lab Surface Phys, Shanghai, Peoples R China 3.Fudan Univ, Dept Phys, Shanghai, Peoples R China 4.Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Peoples R China 5.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai, Peoples R China 6.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, HFIPS, Hefei, Peoples R China 7.Tongji Univ, Sch Phys Sci & Engn, Shanghai, Peoples R China 8.Sun Yat Sen Univ, Sch Mat Sci & Engn, Guangzhou, Peoples R China 9.Univ Manchester, Dept Mat, Manchester, Lancs, England 10.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Enze,Xie, Ying-Ming,Fang, Yuqiang,et al. Spin-orbit-parity coupled superconductivity in atomically thin 2M-WS2[J]. NATURE PHYSICS,2022.
APA	Zhang, Enze.,Xie, Ying-Ming.,Fang, Yuqiang.,Zhang, Jinglei.,Xu, Xian.,...&Dong, Shaoming.(2022).Spin-orbit-parity coupled superconductivity in atomically thin 2M-WS2.NATURE PHYSICS.
MLA	Zhang, Enze,et al."Spin-orbit-parity coupled superconductivity in atomically thin 2M-WS2".NATURE PHYSICS (2022).