Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

2-5-2010

Journal or Book Title

Physical Review Letters

Volume

104

Issue

5

First Page

057006

DOI

10.1103/PhysRevLett.104.057006

Abstract

High-resolution x-ray diffraction measurements reveal an unusually strong response of the lattice to superconductivity in Ba(Fe1−xCox)2As2. 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.

Comments

This article is published as Nandi, S., M. G. Kim, A. Kreyssig, R. M. Fernandes, D. K. Pratt, A. Thaler, Ni Ni, S. L. Bud’ko, P. C. Canfield, J. Schmalian, R. J. McQueeney, and A. I. Goldman . "Anomalous suppression of the orthorhombic lattice distortion in superconducting Ba (Fe 1− x Co x) 2 As 2 single crystals." Physical Review Letters 104, no. 5 (2010): 057006. DOI: 10.1103/PhysRevLett.104.057006. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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