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Analysis of shot-noise suppression in disordered quantum wires

✍ Scribed by L. Bonci; G. Fiori; M. Macucci; G. Iannaccone; S. Roddaro; P. Pingue; V. Piazza; M. Cecchini; F. Beltram

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 120 KB
Volume: 19
Category: Article
ISSN: 1386-9477
DOI: 10.1016/s1386-9477(03)00316-3

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✦ Synopsis

We present a numerical model for shot-noise suppression in a semiconductor quantum wire, based on parameters obtained from a purposely fabricated and characterized device. Shot-noise suppression is studied as a function of the voltage applied to the depletion gates forming the wire in a GaAs/AlGaAs heterostructure, of the dopant concentration in the -doping layer, and of the length of the wire. Results provide an understanding of why a conclusive experimental demonstration of di usive transport with 1 3 suppression of shot noise in mesoscopic semiconductor devices has so far proved to be elusive.

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