Directed current in the Holstein system
Other Condensed Matter
2015-05-20 v2 Quantum Physics
Abstract
We propose a mechanism to rectify charge transport in the semiclassical Holstein model. It is shown that localised initial conditions, associated with a polaron solution, in conjunction with a nonreversion symmetric static electron on-site potential constitute minimal prerequisites for the emergence of a directed current in the underlying periodic lattice system. In particular, we demonstrate that for unbiased spatially localised initial conditions, violation of parity prevents the existence of pairs of counter-propagating trajectories, thus allowing for a directed current despite the time-reversibility of the equations of motion. Occurrence of long-range coherent charge transport is demonstrated.
Cite
@article{arxiv.1009.4941,
title = {Directed current in the Holstein system},
author = {D. Hennig and A. D. Burbanks and A. H. Osbaldestin},
journal= {arXiv preprint arXiv:1009.4941},
year = {2015}
}