Pittalis, S.
[UCL]
Raesaenen, E.
[UCL]
Helbig, N.
[UCL]
Gross, E. K. U.
[UCL]
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.
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| Bibliographic reference |
Pittalis, S. ; Raesaenen, E. ; Helbig, N. ; Gross, E. K. U.. Exchange-energy functionals for finite two-dimensional systems. In: Physical review. B, Condensed matter and materials physics, Vol. 76, no. 23 (2007) |
| Permanent URL |
http://hdl.handle.net/2078.1/36906 |
