Extracting convergent surface energies from slab calculations

Physics – Condensed Matter – Materials Science

Scientific paper

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3 revtex pages, 1 figure, in print on J. Phys. Cond. Matt

Scientific paper

10.1088/0953-8984/8/36/005

The formation energy of a solid surface can be extracted from slab calculations if the bulk energy per atom is known. It has been pointed out previously that the resulting surface energy will diverge with slab thickness if the bulk energy is in error, in the context of calculations which used different methods to study the bulk and slab systems. We show here that this result is equally relevant for state-of-the-art computational methods which carefully treat bulk and slab systems in the same way. Here we compare different approaches, and present a solution to the problem that eliminates the divergence and leads to rapidly convergent and accurate surface energies.

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