Document Type

Article

Publication Date

2008

Journal or Book Title

Physical Review B

Volume

77

Issue

19

First Page

195419

DOI

10.1103/PhysRevB.77.195419

Abstract

We have examined bulk structure models for icosahedral AlPdMn in terms of the densities, compositions, and interplanar spacings for the fivefold planes that might represent physical surface terminations. We focus on four models that contain no partial or mixed occupancies, but some comparison is made to a fifth model containing such sites. Each of the four models contains paired planes (layers) that can be separated into two main families on the basis of three features: the relative densities of the two planes, the gap separating the layer from the nearest atomic plane, and the Pd content in the topmost plane. The experimental data and other arguments lead to the conclusion that the family with no Pd in the top plane is favored. Finally, all models show that correlations should be expected between the heights of steps that delineate terraces and average compositional and/or structural features of the terraces.

Comments

This article is from Physical Review B 77, no. 19 (2008): 195419, doi:10.1103/PhysRevB.77.195419.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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