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

H Saarikoski, E Räsänen, S Siljamaki, A Harju, MJ Puska, RM Nieminen

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Abstract

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.

Original languageEnglish
Article number205327
Number of pages5
JournalPhysical Review B
Volume67
Issue number20
DOIs
Publication statusPublished - 15 May 2003
Externally publishedYes
Publication typeA1 Journal article-refereed

Keywords

  • DIMENSIONAL ELECTRON-GAS
  • CORRELATION-ENERGY
  • MAGNETIC-FIELDS
  • QUANTUM DOTS
  • STATES

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