IMR OpenIR
Inducing Strong Superconductivity in WTe2 by a Proximity Effect
Huang, Ce1,2,3; Narayan, Awadhesh4; Zhang, Enze1,2,3; Liu, Yanwen1,2,3; Yan, Xiao7; Wang, Jiaxiang1,2,3; Zhang, Cheng1,2,3; Wang, Weiyi1,2,3; Zhou, Tong8; Yi, Changjiang9,10; Liu, Shanshan1,2,3; Ling, Jiwei1,2,3; Zhang, Huiqin1,2,3; Liu, Ran1,2,3; Sankar, Raman11,12; Chou, Fangcheng12,13,14; Wang, Yihua15; Shi, Youguo9,10,15; Law, Kam Tuen8; Sanvito, Stefano5,6; Zhou, Peng7; Han, Zheng16; Xiu, Faxian15,17
Corresponding AuthorZhou, Peng(Pengzhou@fudan.edu.cn) ; Han, Zheng(Zhenghan1985@gmail.com) ; Xiu, Faxian(Faxian@fudan.edu.cn)
2018-07-01
Source PublicationACS NANO
ISSN1936-0851
Volume12Issue:7Pages:7185-7196
AbstractThe search for proximity-induced conductivity in topological materials has generated wide-NbSe2, spread interest in the condensed matter physics community. The superconducting states inheriting nontrivial topology at interfaces are expected to exhibit exotic phenomena such as topological superconductivity and Majorana zero modes, which hold promise for applications in quantum computation. However, a practical realization of such hybrid structures based on topological semimetals and OAT-superconductors has hitherto been limited. Here, we report 7 8 0 the strong proximity -induced superconductivity in type -II Weyl semimetal WTe, in a van der Waals hybrid structure obtained by mechanically transferring NbSe2 onto various thicknesses of WTe2. When the WTe2 thickness (twre) reaches 21 mu m, the superconducting transition occurs around the critical temperature (V of NbSe2 with a gap amplitude (op) of 0.38 meV and an unexpected ultralong proximity length (in) up to 7 mu m. With the thicker 42 mu m WTe2 layer, however, the proximity effect yields T-c approximate to 1.2 K, Op = 0.07 meV, and a short 1p of less than 1 mu m. Our theoretical calculations, based on the Bogoliubov-de Gennes equations in the clean limit, predict that the induced superconducting gap is a sizable fraction of the NbSe2 superconducting one when twre, is less than 30 nm and then decreases quickly as t(WTe2) increases. This agrees qualitatively well with the experiments. Such observations form a basis in the search for superconducting phases in topological semimetals.
KeywordWTe2 superconducting proximity effect Andreev reflection Bogoliubov-de Gennes equations topological semimetals
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; Science Foundation Ireland
DOI10.1021/acsnano.8b03102
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2018YFA0305601] ; National Key Research and Development Program of China[2017YFA0303302] ; National Key Research and Development Program of China[2017YFA0302901] ; National Key Research and Development Program of China[2016YFA0300604] ; National Natural Science Foundation of China[11474058] ; National Natural Science Foundation of China[61674040] ; National Natural Science Foundation of China[11774399] ; National Natural Science Foundation of China[11474330] ; Science Foundation Ireland[14/IA/2624] ; Science Foundation Ireland[16/US-C2C/3287]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000440505000084
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/128975
Collection中国科学院金属研究所
Corresponding AuthorZhou, Peng; Han, Zheng; Xiu, Faxian
Affiliation1.Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China
2.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
3.Fudan Univ, Inst Nanoelect Devices & Quantum Comp, Shanghai 200433, Peoples R China
4.Swiss Fed Inst Technol, Mat Theory, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland
5.Trinity Coll Dublin, Sch Phys, AMBER, Dublin 2, Ireland
6.Trinity Coll Dublin, CRANN Inst, Dublin 2, Ireland
7.Fudan Univ, Dept Microelect, State Key Lab ASIC & Syst, Shanghai 200433, Peoples R China
8.Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China
9.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
10.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
11.Acad Sinica, Inst Phys, Taipei 11529, Taiwan
12.Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan
13.Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
14.Minist Sci & Technol, Taiwan Consortium Emergent Crystalline Mat, Taipei 10622, Taiwan
15.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100190, Peoples R China
16.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
17.Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Huang, Ce,Narayan, Awadhesh,Zhang, Enze,et al. Inducing Strong Superconductivity in WTe2 by a Proximity Effect[J]. ACS NANO,2018,12(7):7185-7196.
APA Huang, Ce.,Narayan, Awadhesh.,Zhang, Enze.,Liu, Yanwen.,Yan, Xiao.,...&Xiu, Faxian.(2018).Inducing Strong Superconductivity in WTe2 by a Proximity Effect.ACS NANO,12(7),7185-7196.
MLA Huang, Ce,et al."Inducing Strong Superconductivity in WTe2 by a Proximity Effect".ACS NANO 12.7(2018):7185-7196.
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