Title
Exact broken-symmetry states and Hartree-Fock solutions for quantum dots at high magnetic fields Exact broken-symmetry states and Hartree-Fock solutions for quantum dots at high magnetic fields
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam :North-Holland ,
Subject
Physics
Engineering sciences. Technology
Source (journal)
Physica. E: Low-dimensional systems and nanostructures. - Amsterdam
Source (book)
3rd International Conference on Quantum Dots (QD 2004), MAY 10-13, 2004, Max Bell Bldg Banff Ctr, Banff, Canada
Volume/pages
26(2005) :1-4 , p. 252-256
ISSN
1386-9477
ISI
000227249000053
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Wigner molecules formed at high magnetic fields in circular and elliptic quantum dots are studied by exact diagonalization (ED) and unrestricted Hartree-Fock (UHF) methods with multicenter basis of displaced lowest Landau level wave functions. The broken symmetry states with semi-classical charge density constructed from superpositions of the ED solutions are compared to the UHF results. UHF overlooks the dependence of the few-electron wave functions on the actual relative positions of electrons localized in different charge puddles and partially compensates for this neglect by an exaggerated separation of charge islands which are more strongly localized than in the exact broken-symmetry states. (C) 2004 Elsevier B.V. All rights reserved.
E-info
https://repository.uantwerpen.be/docman/iruaauth/e7462d/54a5814.pdf
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