Zilly, Matias; Ujsághy, Orsolya; Wolf, Dietrich:
Statistical model for the effects of dephasing on transport properties of large samples
2009
In: European physical journal / B, Jg. 68 (2009), Heft 2, S. 237 - 246
Artikel/Aufsatz in Zeitschrift / Fach: Physik
Zentrale wissenschaftliche Einrichtungen » Center for Nanointegration Duisburg-Essen (CENIDE)
Titel:
Statistical model for the effects of dephasing on transport properties of large samples
Autor(in):
Zilly, Matias im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Ujsághy, Orsolya; Wolf, Dietrich im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen
Erscheinungsjahr:
2009
Erschienen in:
European physical journal / B, Jg. 68 (2009), Heft 2, S. 237 - 246
ISSN:
DOI:

Abstract:

We present a statistical model for the effects of dephasing on the transport properties of large devices. The physical picture is different from earlier models which assume that dephasing happens continuously throughout the sample, whereas we model the dephasing in a statistical sense, assuming a distribution of completely phase randomizing regions between which the transport is coherent and described by the nonequilibrium Green’s function method. Thus the sample is effectively divided into smaller parts making the numerical treatment more efficient. As a first application the conductances of ordered and disordered linear tight-binding chains are calculated and compared to the results of other phenomenological models in the literature.