Document Type

Article

Publication Date

4-1-1998

Journal or Book Title

Physical Review B

Volume

57

Issue

13

First Page

7628

Last Page

7641

DOI

10.1103/PhysRevB.57.7628

Abstract

The atomic structure of the fivefold symmetric quasicrystal surface of icosahedral AlPdMn has been investigated by means of a dynamical low-energy-electron diffraction (LEED) analysis. Approximations were developed to make the structure of an aperiodic, quasicrystalline surface region accessible to LEED theory. A mix of several closely similar, relaxed, bulklike lattice terminations is favored, all of which have a dense Al-rich layer on top followed by a layer with a composition of about 50% Al and 50% Pd. The interlayer spacing between these two topmost layers is contracted from the bulk value by 0.1 Å, to a final value of 0.38 Å, and the lateral density of the two topmost layers taken together is similar to that of an Al(111) surface. The LEED structural result is qualitatively consistent with data from ion scattering spectroscopy, which supports an Al-rich termination.

Comments

This article is from Physical Review B 57, no. 13 (1998): 7628–7641, doi:10.1103/PhysRevB.57.7628.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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