Tellurium substitution effect on superconductivity of the α-phase iron selenide

被引：589

作者：

Yeh, Kuo-Wei ^{[1
]}

Huang, Tzu-Wen ^{[1
]}

Huang, Yi-Lin ^{[1
]}

Chen, Ta-Kun ^{[1
]}

Hsu, Fong-Chi ^{[1
,2
]}

Wu, Phillip M. ^{[3
]}

Lee, Yong-Chi ^{[1
]}

Chu, Yan-Yi ^{[1
,2
]}

Chen, Chi-Lian ^{[1
]}

Luo, Jiu-Yong ^{[1
]}

Yan, Der-Chung ^{[1
]}

Wu, Maw-Kuen ^{[1
]}

机构：

[1] Acad Sinica, Inst Phys, Taipei, Taiwan

[2] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan

[3] Duke Univ, Dept Phys, Durham, NC 27706 USA

来源：

EPL | 2008年 / 84卷 / 03期

关键词：

D O I：

10.1209/0295-5075/84/37002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have carried out a systematic study of the PbO-type compound FeSe1-xTex (x = 0-1), where the Te substitution effect on superconductivity is investigated. It is found that the superconducting transition temperature reaches a maximum of T-c = 15.2 K at about 50% Te substitution. The pressure-enhanced Tc of FeSe0.5Te0.5 is more than 10 times larger than that of FeSe. Interestingly, FeTe is no longer superconducting. A low-temperature structural distortion changes FeTe from triclinic symmetry to orthorhombic symmetry. We believe that this structural change breaks the magnetic symmetry and suppresses superconductivity in FeTe. Copyright (C) EPLA, 2008

引用

页数：4

共 9 条

[1]

CHOU CC, 2008, COMMUNICATION

[2] Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems [J].