2010/04/01 by T. Koch, T Koch, J Loos +7 · 13 citations
Chemistry · Engineering · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Conductance #Coupling (piping) #Energy transport #Function (biology) #Molecular Junctions and Nanostructures #Polaron #Quantum #Quantum and electron transport phenomena #Quantum dot #Spectral function #cond-mat.mes-hall
paper · pdf · doi:10.1088/1742-6596/220/1/012014
published in Journal of Physics Conference Series 220, 012014 (IOP Publishing) · 10 pages, 8 figures, Proceedings of "Progress in Nonequilibrium Green's Function IV" Conference, Glasgow 2009
openalex publication_date 2010/04/01 · arxiv created 2010/05/30 · arxiv updated 2015/05/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We present a Green's function based treatment of the effects of electron-phonon coupling on transport through a molecular quantum dot in the quantum limit. Thereby we combine an incomplete variational Lang-Firsov approach with a perturbative calculation of the electron-phonon self energy in the framework of generalised Matsubara Green functions and a Landauer-type transport description. Calculating the ground-state energy, the dot single-particle spectral function and the linear conductance at finite carrier density, we study the low-temperature transport properties of the vibrating quantum dot sandwiched between metallic leads in the whole electron-phonon coupling strength regime. We discuss corrections to the concept of an anti-adiabatic dot polaron and show how a deformable quantum dot can act as a molecular switch.