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

Abstract 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 superconductivi...

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Autores principales:	Qing Dong, Quanjun Li, Shujia Li, Xuhan Shi, Shifeng Niu, Shijie Liu, Ran Liu, Bo Liu, Xuan Luo, Jianguo Si, Wenjian Lu, Ning Hao, Yuping Sun, Bingbing Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/e3fb35752fc140c586924ef74e66ad1c
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spelling	oai:doaj.org-article:e3fb35752fc140c586924ef74e66ad1c2021-12-02T13:50:07ZStructural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa10.1038/s41535-021-00320-x2397-4648https://doaj.org/article/e3fb35752fc140c586924ef74e66ad1c2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00320-xhttps://doaj.org/toc/2397-4648Abstract 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 ~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 ~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.Qing DongQuanjun LiShujia LiXuhan ShiShifeng NiuShijie LiuRan LiuBo LiuXuan LuoJianguo SiWenjian LuNing HaoYuping SunBingbing LiuNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 Qing Dong Quanjun Li Shujia Li Xuhan Shi Shifeng Niu Shijie Liu Ran Liu Bo Liu Xuan Luo Jianguo Si Wenjian Lu Ning Hao Yuping Sun Bingbing Liu Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa
description	Abstract 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 ~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 ~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.
format	article
author	Qing Dong Quanjun Li Shujia Li Xuhan Shi Shifeng Niu Shijie Liu Ran Liu Bo Liu Xuan Luo Jianguo Si Wenjian Lu Ning Hao Yuping Sun Bingbing Liu
author_facet	Qing Dong Quanjun Li Shujia Li Xuhan Shi Shifeng Niu Shijie Liu Ran Liu Bo Liu Xuan Luo Jianguo Si Wenjian Lu Ning Hao Yuping Sun Bingbing Liu
author_sort	Qing Dong
title	Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa
title_short	Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa
title_full	Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa
title_fullStr	Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa
title_full_unstemmed	Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa
title_sort	structural phase transition and superconductivity hierarchy in 1t-tas2 under pressure up to 100 gpa
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e3fb35752fc140c586924ef74e66ad1c
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Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa

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