Superconductivity in Iron Telluride Thin Films under Tensile Stress

被引：147

作者：

Han, Y. ^{[1
,2
]}

Li, W. Y. ^{[1
,2
]}

Cao, L. X. ^{[1
,2
]}

Wang, X. Y. ^{[3
]}

Xu, B. ^{[1
,2
]}

Zhao, B. R. ^{[1
,2
]}

Guo, Y. Q. ^{[4
]}

Yang, J. L. ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China

[4] N China Elect Power Univ, Sch Energy & Power Engn, Beijing 102206, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 01期

关键词：

43; K; FESE; COMPOUND; PRESSURE;

D O I：

10.1103/PhysRevLett.104.017003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By realizing in thin films a tensile stress state, superconductivity of 13 K was introduced into FeTe, a nonsuperconducting parent compound of the iron pnictides and chalcogenides, with a transition temperature higher than that of its superconducting isostructural counterpart FeSe. For these tensile stressed films, superconductivity is accompanied by a softening of the first-order magnetic and structural phase transition, and also, the in-plane extension and out-of-plane contraction are universal in all FeTe films independent of the sign of the lattice mismatch, either positive or negative. Moreover, the correlations were found to exist between the transition temperatures and the tetrahedra bond angles in these thin films.

引用

页数：4

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