1201.3913 (Ilja Makkonen et al.)

Exchange-correlation potentials for inhomogeneous electron systems in
two dimensions from exact diagonalization: comparison with the
local-spin-density approximation    [PDF]

Ilja Makkonen, Mikko M. Ervasti, Ville Kauppila, Ari Harju

We consider electronic exchange and correlation effects in density-functional
calculations of two-dimensional systems. Starting from wave function
calculations of total energies and electron densities of inhomogeneous model
systems, we derive corresponding exchange-correlation potentials and energies.
We compare these with predictions of the local-spin-density approximation and
discuss its accuracy. Our data will be useful as reference data in testing,
comparing and parametrizing exchange and correlation functionals for
two-dimensional electronic systems.

View original: http://arxiv.org/abs/1201.3913