Transport through a molecular quantum dot in the polaron crossover regime

Details Transport through a molecular quantum dot in the polaron crossover regime Transport through a molecular quantum dot in the polaron crossover regime

2007-03-23

arxiv.org/abs/cond-mat/0703626v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.76.033417

We consider resonant transport through a molecular quantum dot coupled to a local vibration mode. Applying the non-equilibrium Green function technique in the polaron representation, we develop a non-perturbative scheme to calculate the electron spectral function of the molecule in the regime of intermediate electron-phonon coupling. With increasing tunneling coupling to the leads, correlations between polaron clouds become more important at relatively high temperature leading to a strong sharpening of the peak structure in the spectral function. The detection of such features in the current-voltage characteristics is briefly discussed.

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