New approach for determination of diffusion parameters of adatoms

被引：184

作者：

Bott, M ^{[1
]}

Hohage, M ^{[1
]}

Morgenstern, M ^{[1
]}

Michely, T ^{[1
]}

Comsa, G ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST GRENZFLACHENFORSCH & VAKUUMPHYS, D-52425 JULICH, GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.76.1304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A new approach for the determination of activation energy and attempt frequency for the diffusion of single adatoms on a surface is proposed and demonstrated for Pt adatom diffusion on Pt(lll). The method is based on a combination of low temperature scanning tunneling microscopy (STM) measurements and kinetic Monte Carlo simulations. The method involves only a minimum of assumptions and is independent of classical nucleation theory. This independence allows one to analyze the applicability of the latter. In addition, it is found that the measurement of the mean square displacement of individual adatoms is influenced by the STM tip.

引用

页码：1304 / 1307

页数：4

共 26 条

[1] DYNAMIC SCALING OF THE ISLAND-SIZE DISTRIBUTION AND PERCOLATION IN A MODEL OF SUBMONOLAYER MOLECULAR-BEAM EPITAXY [J].