Molecular electronics in junctions with energy disorder

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.

11 pages, 3 figures

References in corpus (6)

• Driven quantum transport on the nanoscale
• Tuning the conductance of a molecular switch
• Vibrational effects in laser driven molecular wires
• Rectification of laser-induced electronic transport through molecules
• Defective transport properties of three-terminal carbon nanotube junctions
• Coherent charge transport through molecular wires: influence of strong Coulomb repulsion