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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

» presentations   » 2006.03.27-31

Nonequilibrium excitations of molecular vibrons (TT 9.10 Mon 16:30 HSZ 304)

D. A. Ryndyk, M. Hartung, and G. Cuniberti

Deutsche Physikalische Gesellschaft, AKF Frühjahrstagung 2006
German Physical Society, Spring Meeting 2006

2006.03.27-31; Dresden, Germany

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 electronvibron resonance is shown.
[1] D. A. Ryndyk, M. Hartung, and G. Cuniberti, Phys. Rev. B 73, 045420 (2006)

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