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- W2047768061 abstract "We report on a class of icosahedral aluminum–transition-metal (Al-TM) alloys with true semiconducting behavior. The existence of a semiconducting gap is found to depend critically on a particular kind of Al-TM ordering defined by a simple rule in the 6-dimensional superspace. Any deviation from this 6D order leads to the formation of strongly localized defect states in the gap. We show that by a judicious selection of transition metals to be alloyed with Al, we can find alloys with a semiconducting gap at the Fermi level for a hierarchy of approximants to a quasicrystal. As the electron/atom ratio placing the Fermi level into the gap is slightly different for each approximant, this suggests that the gap persists also in the quasiperiodic limit. Icosahedral Al-Pd-Re turns out to be a semiconductor with a band gap filled by the localized states." @default.
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- W2047768061 date "2003-07-01" @default.
- W2047768061 modified "2023-09-26" @default.
- W2047768061 title "Semiconductivity in aluminum–transition-metal quasicrystalline alloys induced by ordering in six dimensions" @default.
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- W2047768061 doi "https://doi.org/10.1209/epl/i2003-00478-8" @default.
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