Control of Tetrahedral Coordination and Superconductivity in FeSe0.5Te0.5 Thin Films

被引：72

作者：

Huang, S. X. ^{[1
]}

Chien, C. L. ^{[1
]}

Thampy, V. ^{[1
,2
]}

Broholm, C. ^{[1
,2
,3
]}

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[2] Johns Hopkins Univ, Inst Quantum Matter, Baltimore, MD 21218 USA

[3] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.104.217002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate a close relationship between superconductivity and the dimensions of the Fe-Se(Te) tetrahedron in FeSe0.5Te0.5. This is done by exploiting thin film epitaxy, which provides controlled biaxial stress, both compressive and tensile, to distort the tetrahedron. The Se/Te height within the tetrahedron is found to be of crucial importance to superconductivity, in agreement with the scenario that (pi, pi) spin fluctuations promote superconductivity in Fe superconductors.

引用

页数：4