Nonequilibrium excitations of molecular vibrons

Details Nonequilibrium excitations of molecular vibrons Nonequilibrium excitations of molecular vibrons

2005-08-05

arxiv.org/abs/cond-mat/0508143v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, submitted

Scientific paper

We consider the nonequilibrium quantum vibrations of a molecule clamped between two macroscopic leads in a current-carrying state at finite voltages. Our approach is based on the nonequilibrium Green function technique and the self-consistent Born approximation. Kinetic equations for the average populations of electrons and vibrons are formulated in the weak electron-vibron coupling case and self-consistent solutions are obtained. The effects of vibron emission and vibronic instability are demonstrated using few-orbital models. The importance of the electron-vibron resonance is shown.

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