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Title: Schwoebel-Ehrlich barrier : from two to three dimensions
Authors: Liu, S. J.
Huang, Hanchen
Woo, Chung-ho
Subjects: Texture
Surface topography
Surface diffusion
Adsorbed layers
Surface energy
Molecular dynamics method
Issue Date: 6-May-2002
Publisher: American Institute of Physics
Source: Applied physics letters, 6 May, 2002, v. 80, no. 18, p. 3295-3297.
Abstract: 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.
Rights: © 2002 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S. J. Liu, Hanchen Huang, & C. H. Woo , Appl. Phys. Lett. 80, 3295 (2002) and may be found at
Type: Journal/Magazine Article
DOI: 10.1063/1.1475774
ISSN: 0003-6951 (print)
1077-3118 (online)
Appears in Collections:ME Journal/Magazine Articles

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