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Science 6 August 1993:
Vol. 261. no. 5122, pp. 737 - 739
DOI: 10.1126/science.261.5122.737
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Articles

Electron Localization in Metallic Quasicrystals

F. S. Pierce 1, S. J. Poon 1, and Q. Guo 1

1 Department of Physics, University of Virginia, Charlottesville, VA 22901

Bulk icosahedral-quasicrystalline aluminum-palladium-rhenium alloys of high structural quality and thermal stability are found to exhibit low-temperature electrical resistivities that are four orders of magnitude larger than those found in disordered metals and metallic glasses. Experiments suggest that these quasiperiodic alloys, which have a semimetallic electron density, are insulators at low temperature. The findings are discussed in light of theories on electron localization and band-gap formation in ordered metallic systems.

Submitted on April 9, 1993
Accepted on June 11, 1993

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Science. ISSN 0036-8075 (print), 1095-9203 (online)