Level fluctuations and many-body effects in disorder-free quantum dots

Authors
Citation
Mc. Cha et Sre. Yang, Level fluctuations and many-body effects in disorder-free quantum dots, PHYS REV B, 61(3), 2000, pp. 1720-1723
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
3
Year of publication
2000
Pages
1720 - 1723
Database
ISI
SICI code
1098-0121(20000115)61:3<1720:LFAMEI>2.0.ZU;2-H
Abstract
We have investigated whether many-body effects can induce significant level fluctuations in a disorder-free quantum dot. The closed energy shell struc tures and relaxation of the Hartree-Fock (HF) potentials are found to play a significant role. The level degeneracy consistent with the rotational sym metry of the confining potential determines the structure of the energy she lls. A closed shell state of a dot can give rise to large fluctuations. Whe n a strong magnetic field is present the shell structure is absent and fluc tuations are significantly reduced.