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Magnetoelastic coupling and charge correlation lengths in a twin domain of Ba(Fe1-xCox)(2)As-2 (x=0.047): A high-resolution x-ray diffraction study

TitleMagnetoelastic coupling and charge correlation lengths in a twin domain of Ba(Fe1-xCox)(2)As-2 (x=0.047): A high-resolution x-ray diffraction study
Publication TypeJournal Article
Year of Publication2013
AuthorsZhang, Q, Wang, WJ, Kim, JW, Hansen, B, Ni, N, Bud'ko, SL, Canfield, PC, McQueeney, RJ, Vaknin, D
JournalPhysical Review B
Volume87
Pagination094510
Date Published03
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000316378600004
Keywordssuperconductor
Abstract

length increases with the decrease of temperature, possibly induced by nematic fluctuations in the paramagnetic tetragonal phase. Upon cooling, anomalies in the in-plane charge correlation lengths along a (xi(a)) and b axes (xi(b)) are observed at T-S and also at T-N indicative of strong magnetoelastic coupling. The in-plane charge correlation lengths are found to exhibit anisotropic behavior along and perpendicular to the in-plane component of stripe-type AFM wave vector (101)(O) below around T-N. The temperature dependence of the out-of-plane charge correlation length shows a single anomaly at T-N, reflecting the connection between Fe-As distance and Fe local moment. The origin of the anisotropic in-plane charge correlation lengths xi(a) and xi(b) is discussed on the basis of the antiphase magnetic domains and their dynamic fluctuations. DOI: 10.1103/PhysRevB.87.094510

DOI10.1103/PhysRevB.87.094510
Custom 1

Complex States

Custom 2

Correlations