Inducing Strong Superconductivity in WTe2 by a Proximity Effect

doi:10.1021/acsnano.8b03102

IMR OpenIR

	Inducing Strong Superconductivity in WTe2 by a Proximity Effect
	Huang, Ce 1,2,3; Narayan, Awadhesh 4; Zhang, Enze 1,2,3; Liu, Yanwen 1,2,3; Yan, Xiao 7; Wang, Jiaxiang 1,2,3; Zhang, Cheng 1,2,3; Wang, Weiyi 1,2,3; Zhou, Tong 8; Yi, Changjiang 9,10; Liu, Shanshan 1,2,3; Ling, Jiwei 1,2,3; Zhang, Huiqin 1,2,3; Liu, Ran 1,2,3; Sankar, Raman 11,12; Chou, Fangcheng 12,13,14; Wang, Yihua 15; Shi, Youguo 9,10,15; Law, Kam Tuen 8; Sanvito, Stefano 5,6; Zhou, Peng 7; Han, Zheng 16; Xiu, Faxian 15,17
通讯作者	Zhou, Peng(Pengzhou@fudan.edu.cn) ; Han, Zheng(Zhenghan1985@gmail.com) ; Xiu, Faxian(Faxian@fudan.edu.cn)
	2018-07-01
发表期刊	ACS NANO
ISSN	1936-0851
卷号	12 期号:7 页码:7185-7196
摘要	The 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.
关键词	WTe2 superconducting proximity effect Andreev reflection Bogoliubov-de Gennes equations topological semimetals
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Science Foundation Ireland
DOI	10.1021/acsnano.8b03102
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000440505000084
出版者	AMER CHEMICAL SOC
引用统计	被引频次：60[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/128975
专题	中国科学院金属研究所
通讯作者	Zhou, Peng; Han, Zheng; Xiu, Faxian
作者单位	1.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
推荐引用方式 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.