The energetics of oxide surfaces by quantum

  title={The energetics of oxide surfaces by quantum},
  author={Monte Carlo and Dario Alf{\`e} and Michael J. Gillan},
Density functional theory (DFT) is widely used in surface science, but for some properties the predictions depend strongly on the approximation used for exchange–correlation energy. We note recent suggestions that the widely used generalized gradient approximation (GGA) is inferior to the local density approximation (LDA) for the surface formation energy σ of both transition metals and oxides. We report quantum Monte Carlo calculations of σ for the MgO(001) surface which support the accuracy of… CONTINUE READING