Replicas of the Kondo peak due to electron-vibration interaction in molecular transport properties

Abstract

The low temperature properties of single level molecular quantum dots including both, electron-electron and electron-vibration interactions, are theoretically investigated. The calculated differential conductance in the Kondo regime exhibits not only the zero bias anomaly but also side peaks located at bias voltages which coincide with multiples of the energy of vibronic mode $V\sim \hslash \Omega /e$. We obtain that the evolution with temperature of the two main satellite conductance peaks follows the corresponding one of the Kondo peak when $\hslash \Omega \gg k_B{T}_K$, being $T_K$ the Kondo temperature, in agreement with recent transport measurements in molecular junctions. However, we find that this is no longer valid when $\hslash \Omega$ is of the order of a few times $k_B{T}_K$.

arXiv comment6 pages, 4 figures. Accepted for publication in Physical Review B

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• Inelastic Kondo-Andreev tunnelings in a vibrating quantum dot
• Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
• Destructive quantum interference in transport through molecules with electron-electron and electron-vibration interactions
• Role of asymmetry in thermoelectric properties of a double quantum dot out of equilibrium
• Impact of electron-phonon coupling on electron transport through T-shaped arrangements of quantum dots in the Kondo regime