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EnglishWe 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 δ-doping layer, and of the length of the wire. Results provide an understanding of why a conclusive experimental demonstration of diffusive transport with 1/3 suppression of shot noise in mesoscopic semiconductor devices has so far proved to be elusive.
http://hdl.handle.net/11384/12765| Titolo: | Analysis of shot-noise suppression in disordered quantum wires |
| Autori interni: | BELTRAM, Fabio PINGUE, Pasqualantonio |
| Data di pubblicazione: | 2003 |
| Rivista: | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES |
| Abstract: | 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 δ-doping layer, and of the length of the wire. Results provide an understanding of why a conclusive experimental demonstration of diffusive transport with 1/3 suppression of shot noise in mesoscopic semiconductor devices has so far proved to be elusive. |
| Handle: | http://hdl.handle.net/11384/12765 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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