Transition from one-dimensional to two-dimensional island decay on an anisotropic surface

被引：55

作者：

Morgenstern, K

Lægsgaard, E

Stensgaard, I

Besenbacher, F

机构：

[1] Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark

[2] Aarhus Univ, Ctr Atom Scale & Mat Phys, DK-8000 Aarhus, Denmark

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.83.1613

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the decay of two-dimensional islands on the anisotropic Ag(110) surface using variable temperature scanning tunneling microscopy. Contrary to predictions from traditional Ostwald ripening theory, a quasi-one-dimensional decay mode is observed at low temperatures, 175-220 K. A surprisingly sharp transition to the quasi-two-dimensional decay mode is observed around 220 K. This transition is accompanied by a fast equilibration of the island shape. These findings have tentatively been rationalized within a simple model to identify the underlying rate limiting atomistic processes.

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页码：1613 / 1616

页数：4

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