Exchange-energy functionals for finite two-dimensional systems

S. Pittalis, E. Räsänen, N. Helbig, E. K. U. Gross

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)

Abstract

Implicit and explicit density functionals for the exchange energy in finite two-dimensional systems are developed following the approach of Becke and Roussel [Phys. Rev. A 39, 3761 (1989)]. Excellent agreement for the exchange-hole potentials and exchange energies is found when compared with the exact-exchange reference data for the two-dimensional uniform electron gas and few-electron quantum dots, respectively. Thereby, this work significantly improves the availability of approximate density functionals for dealing with electrons in quasi-two-dimensional structures, which have various applications in semiconductor nanotechnology.

Original languageEnglish
Article number235314
Number of pages5
JournalPhysical Review B
Volume76
Issue number23
DOIs
Publication statusPublished - Dec 2007
Externally publishedYes
Publication typeA1 Journal article-refereed

Keywords

  • ELECTRON-GAS
  • QUANTUM DOTS
  • APPROXIMATIONS
  • MODEL

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