科研之友
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摘要
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.
- 出版日期2011-11-14
