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The low temperature properties of single level molecular quantum dotsincluding both, electron-electron and electron-vibration interactions, aretheoretically investigated. The calculated differential conductance in theKondo regime exhibits not only the zero bias anomaly but also side peakslocated at bias voltages which coincide with multiples of the energy ofvibronic mode $V \sim \hbar\Omega/e$. We obtain that the evolution withtemperature of the two main satellite conductance peaks follows thecorresponding one of the Kondo peak when $\hbar\Omega \gg k_B T_K$, being $T_K$ the Kondo temperature, in agreement with recent transport measurements inmolecular junctions. However, we find that this is no longer valid when $\hbar\Omega$ is of the order of a few times $k_B T_K$.

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