Tip-induced superconductivity on the topological semimetals TaAs2 and NbAs2

doi:10.1103/PhysRevB.102.085139

	Tip-induced superconductivity on the topological semimetals TaAs2 and NbAs2
	Zhang, Meng-Di 2,3; Hou, Xing-Yuan 3,4; Wang, Qing 5,6; Wang, Yi-Yan 3; Zhao, Ling-Xiao 3; Wang, Zong 2,3; Gu, Ya-Dong 2,3; Zhang, Fan 2,3; Xia, Tian-Long 7; Ren, Zhi-An 1,2,3
刊名	PHYSICAL REVIEW B
	2020-08-19
卷号	102
ISSN号	2469-9950
DOI	10.1103/PhysRevB.102.085139
通讯作者	Chen, Gen-Fu(gfchen@iphy.ac.cn)
英文摘要	TaAs2 and NbAs2 are members of the MPn(2) family with weak topological invariants of Z(2) = [0;111]. Here, we report the tip-induced superconductivity achieved on both materials using the point-contact technique. Although the weak Z(2) number leads to strongly crystal-orientation-dependent surface states, we observed a universal relationship between the zero-temperature upper critical field H-c2(0) and the critical temperature T-c for different crystal orientations. Combined with first-principles calculations, the findings here could identify a bulk band, instead of the much speculated surface bands, playing the dominant role in the induced superconductivity. These results predict a great possibility to realize superconductivity in other members of the MPn(2) family possessing similar band structures and provide clues to understand the mechanism of tip-induced superconductivity.
资助项目	National Key R&D Program of China[2018YFA0305602] ; National Key R&D Program of China[2017YFA0302904] ; National Key R&D Program of China[2016YFA0300604] ; National Key R&D Program of China[2017YFA0303201] ; National Natural Science Foundation of China[11574372] ; 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[2015CB921303] ; Chinese Academy of Sciences[XDB33030100] ; 100 Talents Project of the Chinese Academy of Sciences ; CASHIPS Director's Fund[BJPY2019B03] ; Recruitment Program for Leading Talent Team of Anhui Province[2019-16] ; High Magnetic Field Laboratory of Anhui Province
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000560606300005
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; National Basic Research Program of China 973 Program ; Chinese Academy of Sciences ; 100 Talents Project of the Chinese Academy of Sciences ; CASHIPS Director's Fund ; Recruitment Program for Leading Talent Team of Anhui Province ; High Magnetic Field Laboratory of Anhui Province
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/43120]
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.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Phys, Betjing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 4.Anhui Univ, Inst Phys Sci & Informat Technol, Minist Educ, Key Lab Struct & Funct Regulat Hybrid Mat, Hefei 230601, Peoples R China 5.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China 6.Univ Sci & Technol China, Hefei 230026, Peoples R China 7.Renmin Univ China, Dept Phys, Beijing Key Lab Optoelect Funct Mat & Micronano, Beijing 100872, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Meng-Di,Hou, Xing-Yuan,Wang, Qing,et al. Tip-induced superconductivity on the topological semimetals TaAs2 and NbAs2[J]. PHYSICAL REVIEW B,2020,102.
APA	Zhang, Meng-Di.,Hou, Xing-Yuan.,Wang, Qing.,Wang, Yi-Yan.,Zhao, Ling-Xiao.,...&Shan, Lei.(2020).Tip-induced superconductivity on the topological semimetals TaAs2 and NbAs2.PHYSICAL REVIEW B,102.
MLA	Zhang, Meng-Di,et al."Tip-induced superconductivity on the topological semimetals TaAs2 and NbAs2".PHYSICAL REVIEW B 102(2020).