Nontrivial superconductivity in topological MoTe2-xSx crystals

doi:10.1073/pnas.1801650115

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院强磁场科学中心

	Nontrivial superconductivity in topological MoTe2-xSx crystals
	Li, Yanan 1,2,3; Gu, Qiangqiang 1,2; Chen, Chen 4,5; Zhang, Jun 4,5; Liu, Qin 4,5,6; Hu, Xiyao 1; Liu, Jun 7; Liu, Yi 1,2; Ling, Langsheng 7; Tian, Mingliang 7
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2018-09-18
卷号	115 期号:38 页码:9503-9508
关键词	T-d MoTe2-xSx Weyl semimetal s(+-)superconductivity topological superconductivity
ISSN号	0027-8424
DOI	10.1073/pnas.1801650115
通讯作者	Zhang, Tong(tzhang18@fudan.edu.cn) ; Feng, Ji(jfeng11@pku.edu.cn) ; Wang, Jian(jianwangphysics@pku.edu.cn)
英文摘要	Topological Weyl semimetals (TWSs) with pairs of Weyl points and topologically protected Fermi arc states have broadened the classification of topological phases and provide superior platform for study of topological superconductivity. Here we report the nontrivial superconductivity and topological features of sulfur-doped T-d-phase MoTe2 with enhanced T-c compared with type-II TWS MoTe2. It is found that T-d-phase S-doped MoTe2 (MoTe2-xSx, x similar to 0.2) is a two-band s-wave bulk superconductor (similar to 0.13 meV and 0.26 meV), where the superconducting behavior can be explained by the s(+-)pairing model. Further, measurements of the quasi-particle interference (QPI) patterns and a comparison with band-structure calculations reveal the existence of Fermi arcs in MoTe2-xSx. More interestingly, a relatively large superconducting gap (similar to 1.7 meV) is detected by scanning tunneling spectroscopy on the sample surface, showing a hint of topological nontrivial superconductivity based on the pairing of Fermi arc surface states. Our work demonstrates that the T-d-phase MoTe2-xSx is not only a promising topological superconductor candidate but also a unique material for study of s(+-)superconductivity.
资助项目	National Basic Research Program of China[2018YFA0305600] ; National Basic Research Program of China[2016YFA0301004] ; National Basic Research Program of China[2016YFA0300200] ; National Basic Research Program of China[2015CB921700] ; National Basic Research Program of China[2017YFA0303302] ; National Basic Research Program of China[2013CB934600] ; National Basic Research Program of China[2017YFA0303004] ; National Natural Science Foundation of China[11774008] ; National Natural Science Foundation of China[11725415] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB28000000] ; Science Challenge Project[TZ2016004]
WOS关键词	FERMI ARCS ; WEYL SEMIMETALS ; SIGNATURE ; SCHEMES
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATL ACAD SCIENCES
WOS记录号	WOS:000447224900055
资助机构	National Basic Research Program of China ; National Basic Research Program of China ; National Basic Research Program of China ; National Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Science Challenge Project ; Science Challenge Project ; Science Challenge Project ; Science Challenge Project ; National Basic Research Program of China ; National Basic Research Program of China ; National Basic Research Program of China ; National Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Science Challenge Project ; Science Challenge Project ; Science Challenge Project ; Science Challenge Project ; National Basic Research Program of China ; National Basic Research Program of China ; National Basic Research Program of China ; National Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Science Challenge Project ; Science Challenge Project ; Science Challenge Project ; Science Challenge Project ; National Basic Research Program of China ; National Basic Research Program of China ; National Basic Research Program of China ; National Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Science Challenge Project ; Science Challenge Project ; Science Challenge Project ; Science Challenge Project
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/39650]
专题	合肥物质科学研究院_中科院强磁场科学中心
通讯作者	Zhang, Tong; Feng, Ji; Wang, Jian
作者单位	1.Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China 2.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China 3.Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA 4.Fudan Univ, State Key Lab Surface Phys, Dept Phys, Shanghai 200433, Peoples R China 5.Fudan Univ, Lab Adv Mat, Shanghai 200433, Peoples R China 6.Sci & Technol Surface Phys & Chem Lab, Mianyang 621908, Peoples R China 7.Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China 8.Zhejiang Univ, Ctr Electron Microscopy, State Key Lab Silicon Mat, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China 9.Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China 10.Univ Chinese Acad Sci, Chinese Acad Sci, Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Yanan,Gu, Qiangqiang,Chen, Chen,et al. Nontrivial superconductivity in topological MoTe2-xSx crystals[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(38):9503-9508.
APA	Li, Yanan.,Gu, Qiangqiang.,Chen, Chen.,Zhang, Jun.,Liu, Qin.,...&Wang, Jian.(2018).Nontrivial superconductivity in topological MoTe2-xSx crystals.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(38),9503-9508.
MLA	Li, Yanan,et al."Nontrivial superconductivity in topological MoTe2-xSx crystals".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.38(2018):9503-9508.