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    Density-functional theory of the phase diagram of maximum-density droplets in two-dimensional quantum dots in a magnetic field

    Ferconi, Maurizio, 1964-
    Vignale, Giovanni, 1957-
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    [PDF] DensityFunctionalTheoryPhaseDiagram.pdf (121.1Kb)
    Date
    1997
    Format
    Article
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    Abstract
    We present a density-functional theory (DFT) approach to the study of the phase diagram of the maximum-density droplet (MDD) in two-dimensional quantum dots in a magnetic field. Within the lowest Landau level (LLL) approximation, analytical expressions are derived for the values of the parameters N (number of electrons) and B (magnetic field) at which the transition from the MDD to a “reconstructed” phase takes place. The results are then compared with those of full Kohn-Sham calculations, giving thus information about both correlation and Landau level mixing effects. Our results are also contrasted with those of Hartree-Fock (HF) calculations, showing that DFT predicts a phase diagram, which is in better agreement with the experimental results and the result of exact diagonalizations in the LLL than the HF calculations.
    URI
    http://hdl.handle.net/10355/7944
    Citation
    Phys. Rev. B 56, 12108-12111 (1997)
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