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

TitleAnomalous Suppression of the Orthorhombic Lattice Distortion in Superconducting Ba(Fe1-xCox)(2)As-2 Single Crystals
Publication TypeJournal Article
Year of Publication2010
AuthorsNandi S, Kim MG, Kreyssig A, Fernandes RM, Pratt DK, Thaler A, Ni N, Bud'ko SL, Canfield PC, Schmalian J, McQueeney RJ, Goldman AI
Journal TitlePhysical Review Letters
Volume104
Pages057006
Date Published02/05
ISBN Number0031-9007
Accession NumberISI:000274336800042
Abstract

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.
URL<Go to ISI>://000274336800042
DOI10.1103/Physrevlett.104.057006