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Proceedings Paper

Suppression and enhancement of shot noise in mesoscopic transport through localized states
Author(s): Alex K. Savchenko; Sergey S. Safonov; Sergei H. Roshko; Dmitrii A. Bagrets; Oleg N. Jouravlev; Yuli V. Nazarov; Edmund H. Linfield; Dave A. Ritchie
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Paper Abstract

We show that shot noise is an informative tool for studies of hopping and resonant tunnelling between localized electron states. In hopping via several states, shot noise is seen to be always suppressed compared with its classical Poisson value SI = 2eI (I is the average current). The degree of suppression depends on the geometry of current paths and the distribution of the barriers between the localized states. In resonant tunnelling through a single impurity an unusual enhancement of shot noise is observed. It has been established, both experimentally and theoretically, that a considerable increase of noise occurs in the case of two interacting resonant tunnelling channels.

Paper Details

Date Published: 8 May 2003
PDF: 12 pages
Proc. SPIE 5115, Noise and Information in Nanoelectronics, Sensors, and Standards, (8 May 2003); doi: 10.1117/12.497419
Show Author Affiliations
Alex K. Savchenko, Univ. of Exeter (United Kingdom)
Sergey S. Safonov, Univ. of Exeter (United Kingdom)
Sergei H. Roshko, Univ. of Exeter (United Kingdom)
Dmitrii A. Bagrets, Technische Univ. Delft (Netherlands)
Oleg N. Jouravlev, Technische Univ. Delft (Netherlands)
Yuli V. Nazarov, Technische Univ. Delft (Netherlands)
Edmund H. Linfield, Cavendish Lab./Univ. of Cambridge (United Kingdom)
Dave A. Ritchie, Cavendish Lab./Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 5115:
Noise and Information in Nanoelectronics, Sensors, and Standards
Laszlo B. Kish; Frederick Green; Giuseppe Iannaccone; John R. Vig, Editor(s)

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