Schwoebel-Ehrlich barrier: from two to three dimensions

被引：103

作者：

Liu, SJ ^{[1
]}

Huang, HC ^{[1
]}

Woo, CH ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 18期

关键词：

D O I：

10.1063/1.1475774

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The Schwoebel-Ehrlich barrier-the additional barrier for an adatom to diffuse down a surface step-dictates the growth modes of thin films. The conventional concept of this barrier is two dimensional (2D), with the surface step being one monolayer. We propose the concept of a three-dimensional (3D) Schwoebel-Ehrlich barrier, and identify the 2D to 3D transition, taking aluminum as a prototype and using the molecular statics method. Our results show that: (1) substantial differences exist between the 2D and 3D barriers; (2) the transition completes in four monolayers; and (3) there is a major disparity in the 3D barriers between two facets; further, alteration of this disparity using surfactants can lead to the dominance of surface facet against thermodynamics. (C) 2002 American Institute of Physics.

引用

页码：3295 / 3297

页数：3

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