Franz J Kaiser et al 2008 New J. Phys. 10 065013 doi:10.1088/1367-2630/10/6/065013
Franz J Kaiser1, Peter Hänggi and Sigmund Kohler
Show affiliationsPart of Focus on Molecular Electronics
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 driving can induce a ratchet current.
Issue 6 (June 2008)
Received 31 March 2008
Published 30 June 2008
Franz J Kaiser et al 2008 New J. Phys. 10 065013