Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa

doi:10.1038/s41535-021-00320-x

	Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa
	Dong, Qing 1; Li, Quanjun 1; Li, Shujia 1; Shi, Xuhan 1; Niu, Shifeng 1; Liu, Shijie 1; Liu, Ran 1; Liu, Bo 1; Luo, Xuan 2; Si, Jianguo 2,3
刊名	NPJ QUANTUM MATERIALS
	2021-03-02
卷号	6
DOI	10.1038/s41535-021-00320-x
通讯作者	Li, Quanjun(liquanjun@jlu.edu.cn) ; Sun, Yuping(ypsun@issp.ac.cn) ; Liu, Bingbing(liubb@jlu.edu.cn)
英文摘要	The adoption of high pressure not only reinforces the comprehension of the structure and exotic electronic states of transition metal dichalcogenides (TMDs) but also promotes the discovery of intriguing phenomena. Here, 1T-TaS2 was investigated up to 100 GPa, and re-enhanced superconductivity was found with structural phase transitions. The discovered I4/mmm TaS2 presents strong electron-phonon coupling, revealing a good superconductivity of the nonlayered structure. The P-T phase diagram shows a dome shape centered at similar to 20 GPa, which is attributed to the distortion of the 1T structure. Accompanied by the transition to nonlayered structure above 44.5 GPa, the superconducting critical temperature shows an increasing trend and reaches similar to 7 K at the highest studied pressure, presenting superior superconductivity compared to the original layered structure. It is unexpected that the pressure-induced re-enhanced superconductivity was observed in TMDs, and the transition from a superconductor with complicated electron-pairing mechanism to a phonon-mediated superconductor would expand the field of pressure-modified superconductivity.
资助项目	National Key R&D Program of China[2018YFA0305900] ; National Key R&D Program of China[2016YFA0300404] ; NSFC[11874172] ; NSFC[11374120] ; NSFC[11634004] ; NSFC[51320105007] ; NSFC[11674326] ; NSFC[11874357] ; NSFC[U2032215] ; NSFC[U1932217] ; NSFC[U1832141] ; JLU Science and Technology Innovative Research Team[2017TD-01]
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	NATURE RESEARCH
WOS记录号	WOS:000626057200002
资助机构	National Key R&D Program of China ; NSFC ; JLU Science and Technology Innovative Research Team
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/121098]
专题	中国科学院合肥物质科学研究院
通讯作者	Li, Quanjun; Sun, Yuping; Liu, Bingbing
作者单位	1.Jilin Univ, State Key Lab Superhard Mat, Changchun, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei, Peoples R China 3.Univ Sci & Technol China, Hefei, Peoples R China 4.Chinese Acad Sci, High Field Magnet Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei, Peoples R China 5.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Dong, Qing,Li, Quanjun,Li, Shujia,et al. Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa[J]. NPJ QUANTUM MATERIALS,2021,6.
APA	Dong, Qing.,Li, Quanjun.,Li, Shujia.,Shi, Xuhan.,Niu, Shifeng.,...&Liu, Bingbing.(2021).Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa.NPJ QUANTUM MATERIALS,6.
MLA	Dong, Qing,et al."Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa".NPJ QUANTUM MATERIALS 6(2021).