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Article overview
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Simple exchange-correlation potential with a proper long-range behavior for low-dimensional nanostructures | | S. Pittalis
; E. Rasanen
; | | Date: |
30 Aug 2010 | | Abstract: | The exchange-correlation potentials stemming from the local-density
approximation and several generalized-gradient approximations are known to have
incorrect asymptotic decay. This failure is independent of the dimensionality,
but so far the problem has been corrected -- within the mentioned
approximations -- only in three dimensions. Here we provide a cured
exchange-correlation potential in two dimensions, where the applications have a
continuously increasing range in, e.g., semiconductor physics. The given
potential is a generalized-gradient approximation, which is as easy to apply as
the local-density approximation. We demonstrate that the corrected potential
agrees very well with the analytic result of a two-electron quantum dot in the
asymptotic regime, and yields plausible exchange-correlation potentials for
larger two-dimensional systems. | | Source: | arXiv, 1008.5160 | | Services: | Forum | Review | PDF | Favorites | |
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