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Two superconducting phases induced at point contacts on the Weyl semimetal TaAs

文献类型：期刊论文

作者Hou, Xing-Yuan2,3; Gu, Ya-Dong3,4; Li, Shu-Jing1,5,6; Zhao, Ling-Xiao3,4; Zhu, Wen-Liang3,4; Wang, Zong3,4; Zhang, Meng-Di3,4; Zhang, Fan3,4; Zhang, Lu3,4; Zi, Hai3
刊名PHYSICAL REVIEW B
出版日期2020-04-08
卷号101
ISSN号2469-9950
DOI10.1103/PhysRevB.101.134503
通讯作者Chen, Gen-Fu(gfchen@iphy.ac.cn)
英文摘要Tip-induced superconductivity at point contacts on the nonsuperconducting Weyl semimetal TaAs has been reported recently. Meanwhile, both the main tetragonal phase and the intergrown hexagonal phase of TaAs were identified to be topologically nontrivial according to theoretical calculations. Here, we report the observation of two independent local superconducting states induced at the point contacts formed on TaAs, which exhibit distinct temperature dependencies of the critical magnetic field H-c2(T). A universal relationship between H-c2(0), T-c, and the Fermi velocities of bulk bands near Weyl points of the two TaAs phases was uncovered, demonstrating the dominant role of the bulk bands in the emergence of superconductivity, rather than the surface states. These results provide a direction to study the mechanism of the tip-induced superconductivity in topological semimetals.
WOS关键词TOTAL-ENERGY CALCULATIONS
资助项目National Key Research and Development Program of China[2018YFA0305602] ; National Key Research and Development Program of China[2017YFA0302904] ; National Key Research and Development Program of China[2016YFA0300604] ; National Key Research and Development Program of China[2017YFA0303201] ; National Natural Science Foundation of China[11574372] ; National Natural Science Foundation of China[11625415] ; National Natural Science Foundation of China[11674331] ; National Natural Science Foundation of China[11804379] ; National Natural Science Foundation of China[11874417] ; National Basic Research Program of China 973 Program[2015CB921103] ; National Basic Research Program of China 973 Program[2015CB921303] ; Science Challenge Project[TZ201601] ; CASHIPS Director's Fund[BJPY2019B03] ; Recruitment Program for Leading Talent Team of Anhui Province[2019-16] ; High Magnetic Field Laboratory of Anhui Province, China ; 100 Talents Project of the Chinese Academy of Sciences
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:000524531900004
出版者AMER PHYSICAL SOC
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Basic Research Program of China 973 Program ; Science Challenge Project ; CASHIPS Director's Fund ; Recruitment Program for Leading Talent Team of Anhui Province ; High Magnetic Field Laboratory of Anhui Province, China ; 100 Talents Project of the Chinese Academy of Sciences
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/103725]  
专题中国科学院合肥物质科学研究院
通讯作者Chen, Gen-Fu
作者单位1.Beijing Univ Chem Technol, Coll Math & Phys, Beijing 100029, Peoples R China
2.Anhui Univ, Inst Phys Sci & Informat Technol, Key Lab Struct & Funct Regulat Hybrid Mat, Minist Educ, Hefei 230601, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100190, Peoples R China
5.Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China
6.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China
7.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
推荐引用方式
GB/T 7714		 Hou, Xing-Yuan,Gu, Ya-Dong,Li, Shu-Jing,et al. Two superconducting phases induced at point contacts on the Weyl semimetal TaAs[J]. PHYSICAL REVIEW B,2020,101.
APA Hou, Xing-Yuan.,Gu, Ya-Dong.,Li, Shu-Jing.,Zhao, Ling-Xiao.,Zhu, Wen-Liang.,...&Shan, Lei.(2020).Two superconducting phases induced at point contacts on the Weyl semimetal TaAs.PHYSICAL REVIEW B,101.
MLA Hou, Xing-Yuan,et al."Two superconducting phases induced at point contacts on the Weyl semimetal TaAs".PHYSICAL REVIEW B 101(2020).

入库方式： OAI收割

来源：合肥物质科学研究院

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