Instituto de Ciencia de Materiales de Madrid
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Molecular electronics in junctions with energy disorder

Franz J. Kaiser, Peter Hänggi, and Sigmund Kohler
New J. Phys. 10, 065013 (2008)

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 longwires, 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.
arXiv:0803.4412 [cond-mat]

[ICMM-CSIC] [Condensed Matter Theory]
last modified: 15.3.2024 by Sigmund Kohler