Tight Binding' methods in quantum transport through molecules and small devices: From the coherent to the decoherent description.

H. M. PASTAWSKI; E. MEDINA

REVISTA MEXICANA DE FíSICA

Soc. Mexicana de Física

Año: 2001 vol. 47s1 p. 1 - 23

0035-001X

Tight Binding´ methods in quantum transport through molecules and small devices: From the coherent to the decoherent description. H. M. Pastawski  and E. Medina  ISBN/ISSN: 0035001X Rev. Mex. Fisica  47s1, 1-23 (2001) cond-mat/0103219 Abstract: We discuss the steady-state electronic transport in solid-state and molecular devices in the quantum regime. The decimation technique allows a comprehensive description of the electronic structure. Such a method is used, in conjunction with the generalizations of Landauer´s tunneling formalism, to describe a wide range of transport regimes. We analize mesoscopic and semiclassical metallic transport, the metal-insulator transition, and the resonant tunneling regime. The efects of decoherence on transport is discussed in terms of the D´Amato-Pastawski model. A brief presentation of the time dependent phenomena is also included.Keywords: Quantum coherence; Green´s functions; resonant tunneling