RESTORATION PROCESS OF A CRATER ON A METAL-SURFACE

被引：6

作者：

BABA, M ^{[1
]}

NATORI, A ^{[1
]}

YASUNAGA, H ^{[1
]}

机构：

[1] UNIV ELECTROCOMMUN,CHOFU,TOKYO 182,JAPAN

来源：

SURFACE SCIENCE | 1990年 / 239卷 / 03期

关键词：

D O I：

10.1016/0039-6028(90)90236-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The role of surface diffusion and steps on the filling process of a crater on the surface is investigated by computer simulation. The lattice gas model is used with the nearest neighbor lateral interaction. In the presence of steps, the filling atoms of a crater are supplied from kink sites of nearby steps through a diffusion flux on the terrace because of a concentration gradient of single atoms. If no steps exist, the restoration process does not evolve and thermal equilibrium is held among a crater and single atoms. From the equilibrium concentration of single atoms, the average step free energy of a crater can be estimated with the use of the Gibbs-Thomson relation. The simulated result can explain well the observed behavior of a crater on an Au(111)-plane with STM.

引用

页码：363 / 373

页数：11

共 16 条

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[2]

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