Atom-by-atom and concerted hopping of adatom pairs on an open metal surface

被引:10
作者
Bogicevic, A
Ovesson, S
Lundqvist, BI
Jennison, DR
机构
[1] Sandia Natl Labs, Surface & Interface Sci Dept, Albuquerque, NM 87185 USA
[2] Chalmers, Dept Appl Phys, S-41296 Gothenburg, Sweden
[3] Univ Gothenburg, S-41296 Gothenburg, Sweden
关键词
D O I
10.1103/PhysRevB.61.R2456
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Atom-by-atom and concerted hopping of ad-dimers on the open (100) surface of fee metals are studied by means of density-functional calculations. The adatom interaction is relatively short ranged, and beyond next-nearest neighbors ad-dimers are effectively dissociated. Diffusion takes place by a simple shearing process, favored because it maximizes adatom coordination at the transition state. This holds for Al, Au, and Rh, and is likely a general result because geometrical arguments dominate over details of the electronic structure.
引用
收藏
页码:R2456 / R2459
页数:4
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