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TT: Tiefe Temperaturen

TT 9: Transport: Nanoelectronics III - Molecular Electronics

TT 9.10: Talk

Monday, March 27, 2006, 16:30–16:45, HSZ 304

Nonequilibrium excitations of molecular vibrons — •Dmitry Ryndyk, Michael Hartung, and Gianaurelio Cuniberti — Institute for Theoretical Physics, University of Regensburg, 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 electron-vibron resonance is shown.

[1] D.A. Ryndyk, M. Hartung, and G. Cuniberti, Phys. Rev. B, to appear; cond-mat/0508143