Shot Noise in Mesoscopic Transport Through Localised States

Details Shot Noise in Mesoscopic Transport Through Localised States Shot Noise in Mesoscopic Transport Through Localised States

2004-02-05

arxiv.org/abs/cond-mat/0402145v1

phys. stat. sol. (b) 241, 26 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 5 figures; Proceedings of the 10th Conference on Hopping and Related Phenomena (Trieste 2003); requires Wiley style f

Scientific paper

10.1002/pssb.200303640

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 $S_I=2eI$ ($I$ 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.

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