Exchange-energy functionals for finite two-dimensional systems

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Implicit and explicit density functionals for the exchange energy in finite two-dimensional systems are developed following the approach of Becke and Roussel. 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 languageAmerican English
Article number235314
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number23
StatePublished - 17 Dec 2007
Externally publishedYes


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