Anisotropic In-Plane Resistivity in the Nematic Phase of the Iron Pnictides

TitleAnisotropic In-Plane Resistivity in the Nematic Phase of the Iron Pnictides
Publication TypeJournal Article
Year of Publication2011
AuthorsFernandes RM, Abrahams E, Schmalian J
Journal TitlePhysical Review Letters
Volume107
Pages217002
Date Published11
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberWOS:000297134600019
Keywordscharge dynamics, detwinned ba(fe1-xcox)(2)as-2, magnetism, MODELS, state, superconductor, transition
Abstract

We show that the interference between scattering by impurities and by critical spin fluctuations gives rise to anisotropic transport in the Ising-nematic state of the iron pnictides. The effect is closely related to the non-Fermi-liquid behavior of the resistivity near an antiferromagnetic quantum critical point. Our theory not only explains the observed sign of the resistivity anisotropy Delta rho in electron-doped systems but also predicts a sign change of Delta rho upon sufficient hole doping. Furthermore, our model naturally addresses the changes in Delta rho upon sample annealing and alkaline-earth substitution.

DOI10.1103/PhysRevLett.107.217002
Alternate JournalPhys. Rev. Lett.