Physics – Condensed Matter – Materials Science
Scientific paper
2002-11-06
Phys. Rev. B 67, 45101 (2003)
Physics
Condensed Matter
Materials Science
5 pages, 1 figure, to appear in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.67.045101
The role that non-local short-range correlation plays at metal surfaces is investigated by analyzing the correlation surface energy into contributions from dynamical density fluctuations of various two-dimensional wave vectors. Although short-range correlation is known to yield considerable correction to the ground-state energy of both uniform and non-uniform systems, short-range correlation effects on intermediate and short-wavelength contributions to the surface formation energy are found to compensate one another. As a result, our calculated surface energies, which are based on a non-local exchange-correlation kernel that provides accurate total energies of a uniform electron gas, are found to be very close to those obtained in the random-phase approximation and support the conclusion that the error introduced by the local-density approximation is small.
Perdew John P.
Pitarke J. M.
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