Journal
PHYSICAL REVIEW B
Volume 76, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.76.033417
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We consider resonant transport through a molecular quantum dot coupled to a local vibration mode. Applying the nonequilibrium Green's function technique in the polaron representation, we develop a nonperturbative 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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