Molecular electronics in junctions with energy disorder
Mesoscale and Nanoscale Physics
2008-07-09 v2
Abstract
We investigate transport through molecular wires whose energy levels are affected by environmental fluctuations. We assume that the relevant fluctuations are so slow that they, within a tight-binding description, can be described by disordered, Gaussian distributed onsite energies. For long wires, we find that the corresponding current distribution can be rather broad even for a small energy variance. Moreover, we analyse with a Floquet master equation the interplay of laser excitations and static disorder. Then the disorder leads to spatial asymmetries such that the laser diving can induce a ratchet current.
Cite
@article{arxiv.0803.4412,
title = {Molecular electronics in junctions with energy disorder},
author = {Franz J. Kaiser and Peter Hänggi and Sigmund Kohler},
journal= {arXiv preprint arXiv:0803.4412},
year = {2008}
}
Comments
11 pages, 3 figures