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Vibrational Sidebands and Kondo-effect in Molecular Transistors

Jens Paaske·Karsten Flensberg
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Abstract

Electron transport through molecular quantum dots coupled to a single vibrational mode is studied in the Kondo regime. We apply a generalized Schrieffer-Wolff transformation to determine the effective low-energy spin-spin-vibron-interaction. From this model we calculate the nonlinear conductance and find Kondo sidebands located at bias-voltages equal to multiples of the vibron frequency. Due to selection rules, the side-peaks are found to have strong gate-voltage dependences, which can be tested experimentally. In the limit of weak electron-vibron coupling, we employ a perturbative renormalization group scheme to calculate analytically the nonlinear conductance.

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Jens Paaske, Karsten Flensberg. 2004-09-07. Vibrational Sidebands and Kondo-effect in Molecular Transistors. https://doi.org/10.1103/physrevlett.94.176801

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