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Phys. Rev. B 67, 205327 (2003) [5 pages]

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

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H. Saarikoski, E. Räsänen, S. Siljamäki, A. Harju, M. J. Puska, and R. M. Nieminen
Laboratory of Physics, Helsinki University of Technology, P.O. Box 1100, FIN-02015 HUT, Finland

Received 3 January 2003; published 30 May 2003

We study a model quantum dot system in an external magnetic field by using both spin-density-functional theory and current-spin density-functional theory. The theories are used with local approximations for the spin-density and 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.


©2003 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.67.205327
DOI: 10.1103/PhysRevB.67.205327
PACS: 73.21.La, 85.35.Be

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