Very large anisotropies in transport quantities have been observed in the presence of very small in-plane structural anisotropy in many strongly correlated electron materials. By studying the two-dimensional Hubbard model with dynamical-mean-field theory for clusters, we show that such large anisotropies can be induced without static stripe order if the interaction is large enough to yield a Mott transition. Anisotropy decreases at large frequency. The maximum effect on conductivity anisotropy occurs in the underdoped regime, as observed in high temperature superconductors.
@article{arxiv.1008.5118,
title = {Dynamical electronic nematicity from Mott physics},
author = {S. Okamoto and D. Sénéchal and M. Civelli and A. -M. S. Tremblay},
journal= {arXiv preprint arXiv:1008.5118},
year = {2015}
}