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A Distinctive Feature of the Surface Structure of Quasicrystals: Intrinsic and Extrinsic Heterogeneity

Authors

  • Patricia A. Thiel ,

    Corresponding author
    1. The Ames Laboratory, Iowa State University, Ames, IA 50011, USA phone:+1 515 294-8985
    2. Department of Chemistry, Iowa State University, Ames, IA 50011, USA
    3. Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
    • The Ames Laboratory, Iowa State University, Ames, IA 50011, USA phone:+1 515 294-8985
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  • Barış Ünal ,

    1. The Ames Laboratory, Iowa State University, Ames, IA 50011, USA phone:+1 515 294-8985
    2. Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
    3. Present address: Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge MA 02139, USA
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  • Cynthia J. Jenks,

    1. The Ames Laboratory, Iowa State University, Ames, IA 50011, USA phone:+1 515 294-8985
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  • Alan I. Goldman ,

    1. The Ames Laboratory, Iowa State University, Ames, IA 50011, USA phone:+1 515 294-8985
    2. Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
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  • Paul C. Canfield ,

    1. The Ames Laboratory, Iowa State University, Ames, IA 50011, USA phone:+1 515 294-8985
    2. Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
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  • Thomas A. Lograsso,

    1. The Ames Laboratory, Iowa State University, Ames, IA 50011, USA phone:+1 515 294-8985
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  • James W. Evans ,

    1. The Ames Laboratory, Iowa State University, Ames, IA 50011, USA phone:+1 515 294-8985
    2. Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
    3. Department of Mathematics, Iowa State University, Ames, IA 50011, USA
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  • Marianne Quiquandon,

    1. LEM CNRS-ONERA, 29 avenue de la Division Leclerc, F-92322 Cha tillon Cedex, France
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  • Denis Gratias,

    1. LEM CNRS-ONERA, 29 avenue de la Division Leclerc, F-92322 Cha tillon Cedex, France
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  • Michel A. Van Hove

    1. Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China
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Abstract

This paper reviews a feature of atomically-clean quasicrystal surfaces that distinguishes them from surfaces of crystalline materials. That feature is a high degree of heterogeneity among different terraces, and among structurally-identical adsorption sites. The heterogeneity can be both structural and chemical in origin. A large variability is expected even for a surface which is perfectly bulk-terminated, and we call this intrinsic heterogeneity. Additional variability can derive from the surface preparation process, which can yield metastable structures. We call this extrinsic heterogeneity. Experimental evidence is given for both cases. This heterogeneity can be an important factor in understanding and predicting surface phenomena such as chemisorption.

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