Suppression of superconductivity and structural phase transitions under   pressure in tetragonal FeS

doi:10.1038/srep31077

CORC > 北京大学 > 化学与分子工程学院

	Suppression of superconductivity and structural phase transitions under pressure in tetragonal FeS
	Lai, Xiaofang ; Liu, Ying ; Lu, Xujie ; Zhang, Sijia ; Bu, Kejun ; Jin, Changqing ; Zhang, Hui ; Lin, Jianhua ; Huang, Fuqiang
刊名	SCIENTIFIC REPORTS
	2016
关键词	RAMAN-SPECTROSCOPY HIGH-TEMPERATURE MACKINAWITE SPIN TRANSPORT DIAGRAM
DOI	10.1038/srep31077
英文摘要	Pressure is a powerful tool to study iron-based superconductors. Here, we report systematic high-pressure transport and structural characterizations of the newly discovered superconductor FeS. It is found that superconductor FeS (tetragonal) partly transforms to a hexagonal structure at 0.4 GPa, and then completely transforms to an orthorhombic phase at 7.4 GPa and finally to a monoclinic phase above 9.0 GPa. The superconducting transition temperature of tetragonal FeS was gradually depressed by pressure, different from the case in tetragonal FeSe. With pressure increasing, the S-Fe-S angles only slightly change but the anion height deviates farther from 1.38 angstrom. This change of anion height, together with the structural instability under pressure, should be closely related to the suppression of superconductivity. We also observed an anomalous metal-semiconductor transition at 6.0 GPa and an unusual increased resistance with further compression above 9.6 GPa. The former can be ascribed to the tetragonal-orthorhombic structural phase transition, and the latter to the electronic structure changes of the high-pressure monoclinic phase. Finally, a phase diagram of tetragonal FeS as functions of pressure and temperature was mapped out for the first time, which will shed new light on understanding of the structure and physics of the superconducting FeS.; Chinese Academy of Sciences [KJCX2-EW-W11, XDB04040200]; National Natural Science Foundation of China [91122034, 51125006, 51202279, 61376056, 21201012, 11275012]; Science and Technology Commission of Shanghai [12XD1406800]; NSF; MOST; CAS of China; US-DOE-NNSA [DE-NA0001974]; DOE-BES [DE-FG02-99ER45775]; [EAR-1128799]; [DE-FG02-94ER14466]; SCI(E); PubMed; ARTICLE; Jin@iphy.ac.cn; jhlin@pku.edu.cn; huangfq@pku.edu.cn; 31077; 6
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/493361]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Lai, Xiaofang,Liu, Ying,Lu, Xujie,et al. Suppression of superconductivity and structural phase transitions under pressure in tetragonal FeS[J]. SCIENTIFIC REPORTS,2016.
APA	Lai, Xiaofang.,Liu, Ying.,Lu, Xujie.,Zhang, Sijia.,Bu, Kejun.,...&Huang, Fuqiang.(2016).Suppression of superconductivity and structural phase transitions under pressure in tetragonal FeS.SCIENTIFIC REPORTS.
MLA	Lai, Xiaofang,et al."Suppression of superconductivity and structural phase transitions under pressure in tetragonal FeS".SCIENTIFIC REPORTS (2016).