Resistivity anisotropy from the multiorbital Boltzmann equation in nematic FeSe

We compute the resistivity anisotropy in the nematic phase of FeSe from the static solution of the multiorbital Boltzmann equation. By introducing disorder at the level of the microscopic multiorbital model we show that even elastic scattering by localized impurities may lead to nontrivial anisotropic renormalization of the electronic velocities, challenging the usual understanding of transport based only on cold- and hot-spots effects. Our model takes into account both the xz/yz and the recently proposed xy nematic ordering. We show that the latter one has a crucial role in order to reproduce the experimentally measured anisotropy, providing a direct fingerprint of the different nematic scenarios on the bulk transport property of FeSe.

Automated summary

In this study, we compute the resistivity anisotropy in the nematic phase of FeSe using the static solution of the multiorbital Boltzmann equation. We introduce disorder at the microscopic multiorbital model level and demonstrate that even elastic scattering by localized impurities can lead to nontrivial anisotropic renormalization of the electronic velocities, challenging the conventional understanding of transport based on cold- and hot-spots effects. Our model considers both the xz/yz and the recently proposed xy nematic ordering, and we show that the latter plays a crucial role in reproducing the experimentally observed anisotropy, providing a direct fingerprint of different nematic scenarios on the bulk transport property of FeSe.