Exchange-correlation orbital functionals in current-density functional theory: Application to a quantum dot in magnetic fields

Physical Review B 77, 245106 (2008)

Exchange-correlation orbital functionals in current-density functional theory: Application to a quantum dot in magnetic fields

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

The description of interacting many-electron systems in external magnetic fields is considered in the framework of the optimized effective potential method extended to current-spin-density functional theory. As a case study, a two-dimensional quantum dot in external magnetic fields is investigated. Excellent agreement with the quantum Monte Carlo results is obtained when self-interaction corrected correlation energies from the standard local spin-density approximation are added to exact-exchange results. Full self-consistency within the complete current-spin-density-functional framework is found to be of minor importance.

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http://dx.doi.org/10.1103/PhysRevB.77.245106

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