Molecular electronics in junctions with energy disorder

Details Molecular electronics in junctions with energy disorder Molecular electronics in junctions with energy disorder

2008-03-31

arxiv.org/abs/0803.4412v2

New J. Phys. 10 065013 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 3 figures

Scientific paper

10.1088/1367-2630/10/6/065013

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.

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