Statistics of Coulomb Blockade Peak Spacings

Distributions of Coulomb blockade peak spacing are reported for large ensembles of both unbroken (magnetic field B = 0) and broken (B 0) time reversal symmetry in GaAs quantum dots. Both distributions are symmetric and roughly gaussian with a width ~ 2-6% of the average spacing, with broad, non-gaus...

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Bibliographic Details
Published in:arXiv.org 1998-03
Main Authors: Patel, S R, Cronenwett, S M, Stewart, D R, Huibers, A G, Marcus, C M, Duruoz, C I, Harris, J S, Campman, K, Gossard, A C
Format: Article
Language:English
Subjects:
Gaussian distribution
Quantum dots
Symmetry
Online Access:Get full text
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Summary:Distributions of Coulomb blockade peak spacing are reported for large ensembles of both unbroken (magnetic field B = 0) and broken (B 0) time reversal symmetry in GaAs quantum dots. Both distributions are symmetric and roughly gaussian with a width ~ 2-6% of the average spacing, with broad, non-gaussian tails. The distribution is systematically wider at B = 0 by a factor of ~ 1.2 +- 0.1. No even-odd spacing correlations or bimodal structure in the spacing distribution is found, suggesting an absence of spin-degeneracy. There is no observed correlation between peak spacing and peak height.
ISSN:2331-8422
DOI:10.48550/arxiv.9708090