Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 16: TR: Nanoelectronics III - Molecular Electronics 1
TT 16.5: Vortrag
Montag, 14. März 2011, 19:15–19:30, HSZ 03
Nonlinear effects of phonon fluctuations on transport through nanoscale junctions — •Daniel F. Urban1, Remi Avriller2, and Alfredo Levy Yeyati2 — 1Physikalisches Institut, Albert-Ludwigs-Universität, 79104 Freiburg, Germany — 2Departamento de Fisica de la Materia Condensada C-XII, Universidad Autonoma de Madrid, E-28049, Madrid, Spain
We analyze the effect of electron-phonon coupling on the full counting statistics of a molecular junction beyond the lowest order perturbation theory. Our approach allows to take into account analytically the feedback between the non-equilibrium phonon and electronic distributions in the quantum regime. We show that for junctions with high transmission and relatively weak electron-phonon coupling this feedback gives rise to increasingly higher nonlinearities in the voltage dependence of the cumulants of the transmitted charges distribution.
[1] D. F. Urban, R. Avriller, and A. Levy Yeyati, Phys. Rev. B 82, 121414 (R) (2010).