Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1999-09-14
Waves in Random Media 9, 163 (1999)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
22 pages, 5 ps figures
Scientific paper
10.1088/0959-7174/9/2/306
This article is concerned with statistics of addition spectra for systems of identical charged particles. A classical model is suggested in order to study fluctuations of Coulomb blockade peak spacings in large two-dimensional semiconductor quantum dots. It is based on the electrostatics of several electron islands among which there are random inductive and capacitive couplings. Each island can accommodate electrons on quantum orbitals whose energy depend also on an external magnetic field. | In contrast with a single island quantum dot where the spacing distribution between conductance peaks is close to Gaussian, here the distribution has a peak at small spacing value. The fluctuations are mainly due to charging effects. The model can explain the occasional occurrence of couples or even triples of closely spaced Coulomb blockade peaks, as well as the qualitative behavior of peak positions with the applied magnetic field.
Avishai Yshai
Berend Daniel
Berkovits Richard
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