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

doi:10.1103/PhysRevB.101.134503

	Two superconducting phases induced at point contacts on the Weyl semimetal TaAs
	Hou, Xing-Yuan 3,7; Gu, Ya-Dong 1,7; Li, Shu-Jing 2,4,5; Zhao, Ling-Xiao 1,7; Zhu, Wen-Liang 1,7; Wang, Zong 1,7; Zhang, Meng-Di 1,7; Zhang, Fan 1,7; Zhang, Lu 1,7; Zi, Hai 7
刊名	PHYSICAL REVIEW B
	2020-04-08
卷号	101
ISSN号	2469-9950
DOI	10.1103/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.
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关键词	TOTAL-ENERGY CALCULATIONS
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000524531900004
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
内容类型	期刊论文
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.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100190, Peoples R China 2.Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China 3.Anhui Univ, Inst Phys Sci & Informat Technol, Key Lab Struct & Funct Regulat Hybrid Mat, Minist Educ, Hefei 230601, Peoples R China 4.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China 5.Beijing Univ Chem Technol, Coll Math & Phys, Beijing 100029, Peoples R China 6.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China 7.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, 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).