Extended states in disordered systems: role of off-diagonal correlations
Disordered Systems and Neural Networks
2009-11-10 v1 Mesoscale and Nanoscale Physics
Abstract
We study one-dimensional systems with random diagonal disorder but off-diagonal short-range correlations imposed by structural constraints. We find that these correlations generate effective conduction channels for finite systems. At a certain golden correlation condition for the hopping amplitudes, we find an extended state for an infinite system. Our model has important implications to charge transport in DNA molecules, and a possible set of experiments in semiconductor superlattices is proposed to verify our most interesting theoretical predictions.
Keywords
Cite
@article{arxiv.cond-mat/0403197,
title = {Extended states in disordered systems: role of off-diagonal correlations},
author = {Wei Zhang and Sergio E. Ulloa},
journal= {arXiv preprint arXiv:cond-mat/0403197},
year = {2009}
}
Comments
4pp, 3 figs, to appear in PRB