Graphene buffer layer on Si-terminated SiC : a multi-minima energy surface studied with an empirical interatomic potential

Details Graphene buffer layer on Si-terminated SiC : a multi-minima energy surface studied with an empirical interatomic potential Graphene buffer layer on Si-terminated SiC : a multi-minima energy surface studied with an empirical interatomic potential

2009-12-10

arxiv.org/abs/0912.2034v1

Journal of Applied Physics, Vol. 107, p. 103514 (2010)

Physics

Condensed Matter

Materials Science

8 pages, 12 figures

Scientific paper

10.1063/1.3357297.

The atomistic structure of the graphene buffer layer on Si-terminated SiC is studied using a modified environment-dependent interatomic potential (EDIP). The investigation of equilibrium state by conjuguate gradients suffers from a complex multi-minima energy surface. A dedicated procedure is therefore presented to provide a suitable initial configuration on the way to the minimum. The result forms an hexagonal pattern with unsticked rods to release the misfit with the surface. The structure presents an agreement with the global pattern obtained by experiments and even with the details of an ab initio calculation.

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