MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Pseudo-Gap In Quasicrystals: A Key to Understand Their Stability and Properties
Esther Belin-FerréVincent FournéeJean Marie Dubois
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2001 Volume 42 Issue 6 Pages 911-919

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Abstract

The majority of stable quasicrystals known so far is based upon aluminum. It turns out that the valence band of aluminum atoms in such quasicrystals, as well as in the crystals that exhibit a similar icosahedral short range order, shows a pronounced pseudo-gap located at the position of the Fermi energy. In the present paper, we describe how this specific feature of quasicrystals is uncovered and quantified using spectroscopy techniques. We show then that the pseudo-gap, which persists up to the surface, plays an important role in the thermodynamic stability of these non-conventional materials and is involved in transport properties as well as in surface properties of aperiodic intermetallics.

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© 2001 The Japan Institute of Metals and Materials
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