Statistics of Coulomb-blockade peak spacings within the Hartree-Fock approximation

Citation
A. Cohn et al., Statistics of Coulomb-blockade peak spacings within the Hartree-Fock approximation, PHYS REV B, 60(4), 1999, pp. 2536-2540
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
4
Year of publication
1999
Pages
2536 - 2540
Database
ISI
SICI code
0163-1829(19990715)60:4<2536:SOCPSW>2.0.ZU;2-D
Abstract
We study the effect of electronic interactions on the addition spectra and on the energy-level distributions of two-dimensional quantum dots with weak disorder using the self-consistent Hartree-Fock approximation for spinless electrons. We show that the distribution of the conductance peak spacings is Gaussian with large fluctuations that exceed, in agreement with experime nts, the mean level spacing of the noninteracting system. We analyze this d istribution on the basis of Koopmans' theorem. We show furthermore that the occupied and unoccupied Hartree-Fock levels exhibit Wigner-Dyson statistic s. [S0163-1829(99)09427-8].