Statistics of Coulomb Blockade Peak Spacings
Mesoscale and Nanoscale Physics
2009-10-30 v2
Abstract
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.
Cite
@article{arxiv.cond-mat/9708090,
title = {Statistics of Coulomb Blockade Peak Spacings},
author = {S. R. Patel and S. M. Cronenwett and D. R. Stewart and A. G. Huibers and C. M. Marcus and C. I. Duruoz and J. S. Harris and K. Campman and A. C. Gossard},
journal= {arXiv preprint arXiv:cond-mat/9708090},
year = {2009}
}
Comments
To appear in PRL; 13 pages, one table, 3 figures; pdf available at http://www-leland.stanford.edu/group/MarcusLab/papers/Patel_peakspacing.pdf