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Proximity-induced surface superconductivity in Dirac semimetal Cd3As2

文献类型：期刊论文

作者Huan, Ce4,5,6; Zhou, Benjamin T.7; Zhang, Huiqin4,5,6; Yang, Bingjia4,5,6; Liu, Ran4,5,6; Wang, Hanwen9; Wan, Yimin4,5,6; Huang, Ke10; Liao, Zhiming1; Zhang, Enze4,5,6
刊名NATURE COMMUNICATIONS
出版日期2019-05-17
卷号10页码:10
ISSN号2041-1723
DOI10.1038/s41467-019-10233-w
通讯作者Xiu, Faxian(Faxian@fudan.edu.cn)
英文摘要Cd3As2 is a three-dimensional Dirac semimetal with separated Dirac points in momentum space. In spite of extensive transport and spectroscopic studies on its exotic properties, the evidence of superconductivity in its surface states remains elusive. Here, we report the observation of proximity-induced surface superconductivity in Nb/Cd3As2 hybrid structures. Our four-terminal transport measurement identifies a pronounced proximity-induced pairing gap (gap size comparable to Nb) on the surfaces, which exhibits a flat conductance plateau in differential conductance spectra, consistent with our theoretical simulations. The surface supercurrent from Nb/Cd3As2/Nb junctions is also achieved with a Fraunhofer/SQUID-like pattern under out-of-plane/in-plane magnetic fields, respectively. The resultant mapping shows a predominant distribution on the top and bottom surfaces as the bulk carriers are depleted, which can be regarded as a higher dimensional analog of edge supercurrent in two-dimensional quantum spin Hall insulators. Our study provides the evidence of surface superconductivity in Dirac semimetals.
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[61322407] ; National Natural Science Foundation of China[11474058] ; National Natural Science Foundation of China[61674040] ; National Natural Science Foundation of China[11874116] ; Croucher Foundation ; HKRGC[16309718] ; HKRGC[16307117] ; HKRGC[16324216] ; HKRGC[C6026-16W] ; China Postdoctoral Innovative Talents Support Program ; Dr. Tai-Chin Lo Foundation
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000468174600017
出版者NATURE PUBLISHING GROUP
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China ; Croucher Foundation ; HKRGC ; China Postdoctoral Innovative Talents Support Program ; Dr. Tai-Chin Lo Foundation
源URL[http://ir.imr.ac.cn/handle/321006/133445]  
专题金属研究所_中国科学院金属研究所
通讯作者Xiu, Faxian
作者单位1.Univ Queensland, Mat Engn, Brisbane, Qld 4072, Australia
2.Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia
3.Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
4.Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China
5.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
6.Fudan Univ, Inst Nanoelect Devices & Quantum Comp, Shanghai 200433, Peoples R China
7.Hong Kong Univ Sci & Technol, Dept Phys, Clear Water Bay, Hong Kong, Peoples R China
8.Univ Technol, Inst Microstruct & Property Adv Mat, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
9.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
10.Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
推荐引用方式
GB/T 7714		 Huan, Ce,Zhou, Benjamin T.,Zhang, Huiqin,et al. Proximity-induced surface superconductivity in Dirac semimetal Cd3As2[J]. NATURE COMMUNICATIONS,2019,10:10.
APA Huan, Ce.,Zhou, Benjamin T..,Zhang, Huiqin.,Yang, Bingjia.,Liu, Ran.,...&Xiu, Faxian.(2019).Proximity-induced surface superconductivity in Dirac semimetal Cd3As2.NATURE COMMUNICATIONS,10,10.
MLA Huan, Ce,et al."Proximity-induced surface superconductivity in Dirac semimetal Cd3As2".NATURE COMMUNICATIONS 10(2019):10.

入库方式： OAI收割

来源：金属研究所

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