Observation of Topological Superconductivity in a Stoichiometric Transition Metal Dichalcogenide 2M-WS<sub>2</sub>

doi:arXiv:2104.06834

	Observation of Topological Superconductivity in a Stoichiometric Transition Metal Dichalcogenide 2M-WS₂
	Li, Y. W1,2,3 ; Zheng, H. J1,3,4 ; Fang, Y. Q 5,6; Zhang, D. Q 7,8,9,10; Chen, Y. J 11; Chen, C.1,3,12 ; Liang, A. J1,3 ; Shi, W. J13,14 ; 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; Cacho, C.17; Wang, M. X1,3 ; He, Y.18; Fu, L.19; Zhang, H. J 8,9,10; Huang, F. Q5,6 ; Yang, L. X 11,20; Liu, Z. K1,3 ; Chen, Y. L1,2,3,11
	2021-04-14
状态	已发表
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 8.8 K (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.
DOI	arXiv:2104.06834
相关网址	查看原文
出处	Arxiv
WOS记录号	PPRN:11830425
WOS类目	Physics, Condensed Matter
资助项目	National Key R&D program of China[
文献类型	预印本
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/348426
专题	物质科学与技术学院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_特聘教授组_黄富强组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_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_公共科研平台_大科学装置建设部物质科学与技术学院_PI研究组_陈成组
作者单位	1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 2.Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China 3.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China 4.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720, USA 5.ShanghaiTech Univ, Ctr Transformat Sci, Shanghai 201210, Peoples R China 6.ShanghaiTech Univ, Shanghai high repetit rate XFEL & extreme light facil SHINE, Shanghai 201210, Peoples R China 7.SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025, USA 8.Elettra Sincrotrone Trieste, I-34149 Trieste, Italy 9.Diamond Light Source, Harwell Campus, Didcot OX11 0DE, England 10.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720, USA 11.MIT, Dept Phys, Cambridge, MA 02139, USA 12.Univ Oxford, Dept Phys, Oxford OX1 3PU, England 13.Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China 14.ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China 15.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 16.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine Microstruct, Shanghai 200050, Peoples R China 17.Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China 18.China Jiliang Univ, Sch Phys, Hangzhou 310018, Peoples R China 19.Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China 20.Nanjing Univ, Sch Phys, Nanjing 210093, Peoples R China
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. 2021.