Anisotropy of Growth of the Close-Packed Surfaces of Silver

Details Anisotropy of Growth of the Close-Packed Surfaces of Silver Anisotropy of Growth of the Close-Packed Surfaces of Silver

1996-07-11

arxiv.org/abs/mtrl-th/9607007v1

Physics

Condensed Matter

Materials Science

RevTeX, 4 pages, 3 figures in uufiles form, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.77.1095

The growth morphology of clean silver exhibits a profound anisotropy: The growing surface of Ag(111) is typically very rough while that of Ag(100) is smooth and flat. This serious and important difference is unexpected, not understood, and hitherto not observed for any other metal. Using density functional theory calculations of self-diffusion on flat and stepped Ag(100) we find, for example, that at flat regions a hopping mechanism is favored, while across step edges diffusion proceeds by an exchange process. The calculated microscopic parameters explain the experimentally reported growth properties.

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