Phonon-affected steady-state transport through molecular quantum dots

0386647 - FZÚ 2013 RIV SE eng J - Článek v odborném periodiku
Koch, T. - Fehske, H. - Loos, Jan
Phonon-affected steady-state transport through molecular quantum dots.
Physica Scripta. T151, č. 1 (2012), 1-10. ISSN 0031-8949. E-ISSN 1402-4896
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: theory of electronic transport * scattering mechanisms * polarons and electron-phonon interactions
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.032, rok: 2012

We consider the transport through a vibrating molecular quantum dot contacted to macroscopic leads acting as charge reservoirs. In the equilibrium and nonequilibrium regimes,we study the formation of a polaron-like transient state at the quantum dot for all the 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.
Trvalý link: http://hdl.handle.net/11104/0215936