First-principles study of wurtzite InN$(0001)$ and $(000{\bar 1})$ surfaces

Details First-principles study of wurtzite InN$(0001)$ and $(000{\bar 1})$ surfaces First-principles study of wurtzite InN$(0001)$ and $(000{\bar 1})$ surfaces

2006-09-22

arxiv.org/abs/cond-mat/0609563v1

Phy. Rev. B vol. 74, page 115319, 2006

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.74.115319

Density-functional calculations are used to study various plausible structures of the wurtzite InN $(0001)$ and $(000{\bar 1})$ surfaces. These structures include the unreconstructed surfaces, surfaces with monolayers of In or N, several possible coverages and locations of In or N adatoms and vacancies. The stable structure of the $(0001)$ surface under N-rich conditions is the unreconstructed, In-terminated, surface, while under In-rich conditions the stable surface has a 3/4 monolayer of In atoms. The stable structure of the InN $(000{\bar 1})$ surface corresponds to a full monolayer of In atoms in the atop sites (directly above the N atoms) over the entire range of accessible In (or N) chemical potential. The atomic structures of the low-energy structures are also discussed.

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