Campus Units

Chemistry, Mathematics, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

11-15-1997

Journal or Book Title

Physical Review B

Volume

56

Issue

19

First Page

12539

Last Page

12543

DOI

10.1103/PhysRevB.56.12539

Abstract

We propose a kinetic model to describe the temperature dependence of the shape of islands formed during submonolayer epitaxy on anisotropic metal surfaces. Our model reveals that "anisotropic corner rounding" is the key atomic process responsible for a transition in island shape, from chain structures at lower temperatures, to compact islands at higher temperatures. Exploiting data for the temperature and flux scaling of the island density, we analyze such behavior observed experimentally in Cu/Pd(110) epitaxy, estimating activation barriers of 0.45 and 0.3 eV for anisotropic terrace diffusion, and 0.65 eV for the slow corner-rounding process.

Comments

This article is from Physical Review B 56 (1997): 12539, doi: 10.1103/PhysRevB.56.12539.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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