Observation of two superconducting domes under pressure in tetragonal FeS

Jun Zhang; Feng Liang Liu; Tian Ping Ying; Na Na Li; Yang Xu; Lan Po He; Xiao Chen Hong; Yun Jie Yu; Ming Xiang Wang; Jian Shen; Wen Ge Yang; Shi Yan Li

doi:10.1038/s41535-017-0050-7

Observation of two superconducting domes under pressure in tetragonal FeS

Jun Zhang
, Feng Liang Liu
, Tian Ping Ying
, Na Na Li
, Yang Xu
, Lan Po He
, Xiao Chen Hong
, Yun Jie Yu
, Ming Xiang Wang
, Jian Shen
, Wen Ge Yang
, Shi Yan Li^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

We investigate the evolution of superconductivity and structure with pressure for the new superconductor FeS (T _c ≈ 4.5 K), a sulfide counterpart of FeSe. A rapid suppression of T _c and vanishing of superconductivity at 4.0 GPa are observed, followed by a second superconducting dome from 5.0 to 22.3 GPa with a 30% enhancement in maximum T _c. An onsite tetragonal to hexagonal phase transition occurs around 7.0 GPa, followed by a broad pressure range of phase coexistence. The residual deformed tetragonal phase is considered as the source of second superconducting dome. The observation of two superconducting domes in iron-based superconductors poses great challenges for understanding their pairing mechanism.

Original language	English
Article number	49
Journal	npj Quantum Materials
Volume	2
Issue number	1
DOIs	https://doi.org/10.1038/s41535-017-0050-7
State	Published - 1 Dec 2017
Externally published	Yes

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title = "Observation of two superconducting domes under pressure in tetragonal FeS",

abstract = "We investigate the evolution of superconductivity and structure with pressure for the new superconductor FeS (T c ≈ 4.5 K), a sulfide counterpart of FeSe. A rapid suppression of T c and vanishing of superconductivity at 4.0 GPa are observed, followed by a second superconducting dome from 5.0 to 22.3 GPa with a 30\% enhancement in maximum T c. An onsite tetragonal to hexagonal phase transition occurs around 7.0 GPa, followed by a broad pressure range of phase coexistence. The residual deformed tetragonal phase is considered as the source of second superconducting dome. The observation of two superconducting domes in iron-based superconductors poses great challenges for understanding their pairing mechanism.",

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doi = "10.1038/s41535-017-0050-7",

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T1 - Observation of two superconducting domes under pressure in tetragonal FeS

AU - Zhang, Jun

AU - Liu, Feng Liang

AU - Ying, Tian Ping

AU - Li, Na Na

AU - Xu, Yang

AU - He, Lan Po

AU - Hong, Xiao Chen

AU - Yu, Yun Jie

AU - Wang, Ming Xiang

AU - Shen, Jian

AU - Yang, Wen Ge

AU - Li, Shi Yan

PY - 2017/12/1

Y1 - 2017/12/1

N2 - We investigate the evolution of superconductivity and structure with pressure for the new superconductor FeS (T c ≈ 4.5 K), a sulfide counterpart of FeSe. A rapid suppression of T c and vanishing of superconductivity at 4.0 GPa are observed, followed by a second superconducting dome from 5.0 to 22.3 GPa with a 30% enhancement in maximum T c. An onsite tetragonal to hexagonal phase transition occurs around 7.0 GPa, followed by a broad pressure range of phase coexistence. The residual deformed tetragonal phase is considered as the source of second superconducting dome. The observation of two superconducting domes in iron-based superconductors poses great challenges for understanding their pairing mechanism.

AB - We investigate the evolution of superconductivity and structure with pressure for the new superconductor FeS (T c ≈ 4.5 K), a sulfide counterpart of FeSe. A rapid suppression of T c and vanishing of superconductivity at 4.0 GPa are observed, followed by a second superconducting dome from 5.0 to 22.3 GPa with a 30% enhancement in maximum T c. An onsite tetragonal to hexagonal phase transition occurs around 7.0 GPa, followed by a broad pressure range of phase coexistence. The residual deformed tetragonal phase is considered as the source of second superconducting dome. The observation of two superconducting domes in iron-based superconductors poses great challenges for understanding their pairing mechanism.

UR - https://www.scopus.com/pages/publications/85044140174

U2 - 10.1038/s41535-017-0050-7

DO - 10.1038/s41535-017-0050-7

M3 - 文章

AN - SCOPUS:85044140174

SN - 2397-4648

VL - 2

JO - npj Quantum Materials

JF - npj Quantum Materials

IS - 1

M1 - 49

ER -

Observation of two superconducting domes under pressure in tetragonal FeS

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