Anomalous Suppression of the Orthorhombic Lattice Distortion in Superconducting Ba(Fe1-xCox)2As2 Single Crystals

被引：363

作者：

Nandi, S. ^{[1
]}

Kim, M. G.

Kreyssig, A.

Fernandes, R. M.

Pratt, D. K.

Thaler, A.

Ni, N.

Bud'ko, S. L.

Canfield, P. C.

Schmalian, J.

McQueeney, R. J.

Goldman, A. I.

机构：

[1] US DOE, Ames Lab, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.104.057006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-resolution x-ray diffraction measurements reveal an unusually strong response of the lattice to superconductivity in Ba(Fe1-xCox)(2)As-2. The orthorhombic distortion of the lattice is suppressed and, for Co doping near x 0.063, the orthorhombic structure evolves smoothly back to a tetragonal structure. We propose that the coupling between orthorhombicity and superconductivity is indirect and arises due to the magnetoelastic coupling, in the form of emergent nematic order, and the strong competition between magnetism and superconductivity.

引用

页数：4

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