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American Physical Society, Physical Review B (Condensed Matter), 20(67), 2003

DOI: 10.1103/physrevb.67.205327

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Testing of two-dimensional local approximations in the current-spin and spin-density-functional theories

Journal article published in 2003 by H. Saarikoski, E. Räsänen ORCID, S. Siljamäki, A. Harju ORCID, Martti J. Puska, Risto M. Nieminen
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Abstract

We study a model quantum dot system in an external magnetic field by using both the spin-density-functional theory and the current-spin-density-functional theory. The theories are used with local approximations for the spin-density and the vorticity. The reliabilities of different parametrizations for the exchange-correlation functionals are tested by comparing the ensuing energetics with quantum Monte Carlo results. The limit where the vorticity dependence should be used in the exchange-correlation functionals is discussed. ; Comment: 18 pages, 3 figures, 5 eps-figure files