MAGIC CLUSTERS IN 2 DIMENSIONS

被引:75
作者
ROSENFELD, G
BECKER, AF
POELSEMA, B
VERHEIJ, LK
COMSA, G
机构
[1] Institut für Grenzflächenforschung und Vakuumphysik, Forschungszentrum Jülich, D-5170 Jülich
关键词
D O I
10.1103/PhysRevLett.69.917
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The initial stages of growth of Pt on Pt(111) have been investigated as a function of the substrate temperature. The main result is that, while between 200 and 400 K the cluster density decreases with increasing temperature in accordance with nucleation theory, in the range of 400-500 K the density increases by more than 1 order of magnitude in obvious contradiction to expectations. At coverages below 0.1 we find at temperatures above 500 K a high density of small clusters (possibly heptamers) which appear to be stable with respect both to decomposition and to further growth.
引用
收藏
页码:917 / 920
页数:4
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