Phonon-affected steady-state transport through molecular quantum dots
arXiv:1204.0090 · doi:10.1088/0031-8949/2012/T151/014039
Abstract
We consider transport through a vibrating molecular quantum dot contacted to macroscopic leads acting as charge reservoirs. In the equilibrium and nonequilibrium regime, we study the formation of a polaron-like transient state at the quantum dot for all ratios of the dot-lead coupling to the energy of the local phonon mode. We show that the polaronic renormalization of the dot-lead coupling is a possible mechanism for negative differential conductance. Moreover, the effective dot level follows one of the lead chemical potentials to enhance resonant transport, causing novel features in the inelastic tunneling signal. In the linear response regime, we investigate the impact of the electron-phonon interaction on the thermoelectrical properties of the quantum dot device.
arXiv comment11 pages, 7 figures, FQMT11 Proceedings
References in corpus (14)
- Molecular Transport Junctions: Vibrational Effects
- Reversible quantum Brownian heat engines for electrons
- Inelastic electron tunneling spectroscopy in molecular junctions: Peaks and dips
- Heat conduction in molecular transport junctions
- Three-terminal thermoelectric transport through a molecular junction
- Polaron band formation in the Holstein model
- On the self-trapping problem of electrons or excitons in one dimension
- Three-terminal thermoelectric transport through a molecule placed on an Aharonov-Bohm ring
- Numerical solution of the Holstein polaron problem
- Phonon Driven Nonlinear Electrical Behavior in Molecular Devices
- Non-equilibrium transport through molecular junctions in the quantum regime
- Localized polarons and doorway vibrons in finite quantum structures
- Phonon affected transport through molecular quantum dots
- Transport through a vibrating quantum dot: Polaronic effects