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Shot noise in mesoscopic transport through localised states
Author(s) -
Savchenko A. K.,
Safonov S. S.,
Roshko S. H.,
Bagrets D. A.,
Jouravlev O. N.,
Nazarov Y. V.,
Linfield E. H.,
Ritchie D. A.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200303640
Subject(s) - shot noise , mesoscopic physics , quantum tunnelling , noise (video) , physics , condensed matter physics , electron , quantum noise , coulomb , quantum mechanics , optics , quantum , artificial intelligence , detector , computer science , image (mathematics)
We show that shot noise can be used for studies of hopping and resonant tunnelling between localised electron states. In hopping via several states, shot noise is seen to be suppressed compared with its classical Poisson value S I = 2 eI ( I is the average current) and the suppression depends on the distribution of the barriers between the localised states. In resonant tunnelling through a single impurity an enhancement of shot noise is observed. It has been established, both theoretically and experimentally, that a considerable increase of noise occurs due to Coulomb interaction between two resonant tunnelling channels. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)