Observation of topological superconductivity in a stoichiometric transition metal dichalcogenide 2M-WS2

doi:10.1038/s41467-021-23076-1

	Observation of topological superconductivity in a stoichiometric transition metal dichalcogenide 2M-WS2
	Li, Y. W.1,2,3 ; Zheng, H. J.1,3,4 ; Fang, Y. Q.5,6; Zhang, D. Q.7,8,9,10; Chen, Y. J.11; Chen, C.1,3,12 ; Liang, A. J.1,3 ; Shi, W. J.13,14 ; Pei, D.2; Xu, L. X.1,4; Liu, S.1,4 ; Pan, J.5; Lu, D. H.15; Hashimoto, M.15; Barinov, A.16; Jung, S. W.17,18; Cacho, C.17; Wang, M. X.1,3 ; He, Y.19; Fu, L.20; Zhang, H. J.8,9,10; Huang, F. Q.5,6; Yang, L. X.11,21; Liu, Z. K.1,3 ; Chen, Y. L.1,2,3,11
	2021
发表期刊	NATURE COMMUNICATIONS (IF:14.7[JCR-2023],16.1[5-Year])
ISSN	2041-1723
卷号	12 期号:1
发表状态	已发表
DOI	10.1038/s41467-021-23076-1
摘要	Topological superconductors (TSCs) are unconventional superconductors with bulk superconducting gap and in-gap Majorana states on the boundary that may be used as topological qubits for quantum computation. Despite their importance in both fundamental research and applications, natural TSCs are very rare. Here, combining state of the art synchrotron and laser-based angle-resolved photoemission spectroscopy, we investigated a stoichiometric transition metal dichalcogenide (TMD), 2M-WS2 with a superconducting transition temperature of 8.8K (the highest among all TMDs in the natural form up to date) and observed distinctive topological surface states (TSSs). Furthermore, in the superconducting state, we found that the TSSs acquired a nodeless superconducting gap with similar magnitude as that of the bulk states. These discoveries not only evidence 2M-WS2 as an intrinsic TSC without the need of sensitive composition tuning or sophisticated heterostructures fabrication, but also provide an ideal platform for device applications thanks to its van der Waals layered structure. Topological superconductors are potentially important for future quantum computation, but they are very rare in nature. Here, the authors observe topological surface states acquiring a nodeless superconducting gap with similar magnitude as that of the bulk states in 2M-WS2, suggesting an intrinsic topological superconductor.
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收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000658736000017
出版者	NATURE RESEARCH
原始文献类型	Article
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/127620
专题	物质科学与技术学院_特聘教授组_陈宇林物质科学与技术学院_PI研究组_柳仲楷组物质科学与技术学院_博士生物质科学与技术学院_公共科研平台_拓扑物理实验室大科学中心大科学中心_公共科研平台_大科学装置建设部
共同第一作者	Zheng, H. J.; Fang, Y. Q.; Zhang, D. Q.
通讯作者	Chen, Y. J.; Zhang, H. J.; Huang, F. Q.; Yang, L. X.; Liu, Z. K.; Chen, Y. L.
作者单位	1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China; 2.Univ Oxford, Dept Phys, Oxford OX1 3PU, England; 3.ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 5.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China; 6.Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China; 7.China Jiliang Univ, Sch Phys, Hangzhou 310018, Peoples R China; 8.Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China; 9.Nanjing Univ, Sch Phys, Nanjing 210093, Peoples R China; 10.Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China; 11.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China; 12.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA; 13.ShanghaiTech Univ, Ctr Transformat Sci, Shanghai 201210, Peoples R China; 14.ShanghaiTech Univ, Shanghai High Repetit Rate XFEL & Extreme Light F, Shanghai 201210, Peoples R China; 15.SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA; 16.Elettra Sincrotrone Trieste, I-34149 Trieste, Basovizza, Italy; 17.Diamond Light Source, Harwell Campus, Didcot OX11 0DE, Oxon, England; 18.Gyeongsang Natl Univ, Dept Phys, Jinju 52828, South Korea; 19.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA; 20.MIT, Dept Phys, Cambridge, MA 02139 USA; 21.Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
第一作者单位	物质科学与技术学院; 上海科技大学
通讯作者单位	物质科学与技术学院; 上海科技大学
第一作者的第一单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Li, Y. W.,Zheng, H. J.,Fang, Y. Q.,et al. Observation of topological superconductivity in a stoichiometric transition metal dichalcogenide 2M-WS2[J]. NATURE COMMUNICATIONS,2021,12(1).
APA	Li, Y. W..,Zheng, H. J..,Fang, Y. Q..,Zhang, D. Q..,Chen, Y. J..,...&Chen, Y. L..(2021).Observation of topological superconductivity in a stoichiometric transition metal dichalcogenide 2M-WS2.NATURE COMMUNICATIONS,12(1).
MLA	Li, Y. W.,et al."Observation of topological superconductivity in a stoichiometric transition metal dichalcogenide 2M-WS2".NATURE COMMUNICATIONS 12.1(2021).