We study the effect of a perpendicular uniform magnetic field on the dissipative conductivity of a rectangular lattice with anisotropic hopping, tx=ty. We show that the magnetic field may enhance dramatically the directional anisotropy in the conductivity. The effect is a measurable physical realization of Aubry's duality in Harper systems.
@article{arxiv.cond-mat/9910209,
title = {Magnetic field induced directional localization in a 2D rectangular lattice},
author = {Armelle Barelli and Jean Bellissard and Francisco Claro},
journal= {arXiv preprint arXiv:cond-mat/9910209},
year = {2009}
}