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We study the joint effects of the electron-phonon interaction (EPI) and intralead electron interaction (IEI) on the density of states (DOS) of a single-molecular quantum dot weakly coupled to Luttinger liquid leads in the Rondo regime by using the extended non-equilibrium Green's function method. The introduction of the EPI yields satellite peaks around the Rondo peak. With the increase of the IEI, all the peak heights reduce and then turn to dips. The full crossover in the DOS from the phonon-assisted one-channel physics to two-channel physics is exhibited. The inelastic tunneling will dominate electron transport for a certain region of interaction strength. (C) 2013 Elsevier Ltd. All rights reserved.
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