Münster 1999 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 23: Poster II

HL 23.14: Poster

Mittwoch, 24. März 1999, 14:00–18:00, Z

Quantum transport and momentum conserving dephasing — •Ivo Knittel, Florian Gagel, and Michael Schreiber — Institut für Physik, Technische Universität, D-09107 Chemnitz

We study numerically the influence of momentum-conserving dephasing on the transport in a disordered chain of scatterers. Loss of phase memory is caused by coupling the transport channels to dephasing reservoirs. In contrast to previously used models, the dephasing reservoirs are linked to the transport channels between the scatterers, and momentum conserving dephasing can be investigated. Our setup provides a model for nanosystems exhibiting conductance quantization at higher temperatures in spite of the presence of phononic interaction. We are able to confirm numerically some theoretical predictions.