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Nontrivial superconductivity in topological MoTe2-xSx crystals

文献类型：期刊论文

作者Li, Yanan1,2,3; Gu, Qiangqiang1,2; Chen, Chen4,5; Zhang, Jun4,5; Liu, Qin4,5,6; Hu, Xiyao1; Liu, Jun7; Liu, Yi1,2; Ling, Langsheng7; Tian, Mingliang7
刊名PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
出版日期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
DOI10.1073/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.
WOS关键词FERMI ARCS ; WEYL SEMIMETALS ; SIGNATURE ; SCHEMES
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研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000447224900055
出版者NATL ACAD SCIENCES
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
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.

入库方式： OAI收割

来源：合肥物质科学研究院

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