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arXiv · 1105.3906

Anisotropic in-plane resistivity in the nematic phase of the iron pnictides

Rafael M. Fernandes·Elihu Abrahams·Jörg Schmalian
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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 $Δρ$ in electron doped systems, but also predicts a sign change of $Δρ$ upon sufficient hole doping. Furthermore, our model naturally addresses the changes in $Δρ$ upon sample annealing and alkaline-earth substitution.

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Rafael M. Fernandes, Elihu Abrahams, Jörg Schmalian. 2011-11-14. Anisotropic in-plane resistivity in the nematic phase of the iron pnictides. https://doi.org/10.1103/physrevlett.107.217002

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