Semi-local density functional for the exchange-correlation energy of electrons in two dimensions

  title={Semi-local density functional for the exchange-correlation energy of electrons in two dimensions},
  author={Esa Rasanen and Stefano Pittalis and J. G. Vilhena and Miguel A. L. Marques},
  journal={arXiv: Strongly Correlated Electrons},
We present a practical and accurate density functional for the exchange-correlation energy of electrons in two dimensions. The exchange part is based on a recent two-dimensional generalized-gradient approximation derived by considering the limits of small and large density gradients. The fully local correlation part is constructed following the Colle-Salvetti scheme and a Gaussian approximation for the pair density. The combination of these expressions is shown to provide an efficient density… 
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