2007/03/23 by Alex Zazunov, Thierry Martin · 29 citations
Engineering · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Crossover #Electron #Materials science #Molecular Junctions and Nanostructures #Non-equilibrium thermodynamics #Phonon #Physics #Polaron #Quantum #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum tunnelling #Semiconductor Quantum Structures and Devices #Sharpening #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.76.033417
published in Physical Review B 76(3) (American Physical Society)
arxiv created 2007/03/23 · openalex publication_date 2007/07/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.