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- W2113131874 abstract "We approach the problem of the metal-non-metal transition in simple metal alloys from a chemical point of view and discuss the appearance of a gap in the electronic density of states in terms of covalency and ionicity as suggested by Pauling, Philips and others. In a simple model, we show that for sufficiently large splitting of the two pure component bands, and therefore for large differences in Pauling electronegativity, an energy gap appears in the electronic spectrum, leading to semiconductor behaviour at intermediary concentrations. The alloy electronic density of states is calculated with the truncated continued fraction method and the importance of charge transfer and short-range order is emphasized. Wir behandeln Metall-Nichtmetall-Übergänge in einfachen Metall-Legierungen. Man geht davon aus, daß eine Änderung in der Bindungsart, z. B. ein Übergang von metallischer zu ionischer- oder kovalenter-Bindung, die Ursache einer Energielücke in der elektronischen Zustandsdichte ist (Pauling, Philips usw.). Mit Hilfe eines einfachen Modells zeigen wir, daß bei genügend großer Aufspaltung der Bänder der reinen Metalle, also bei großen Unterschieden in den Pauling-Elektronegativitäten, eine Energielücke und damit ein “flüssiger Halbleiter” erzeugt werden kann. Die Zustandsdichte wird mit der Kettenbruch-Methode unter Berücksichtigung von Ladungstransfer und Nahordnung berechnet." @default.
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- W2113131874 date "1976-08-01" @default.
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- W2113131874 title "The Metal-Nonmetal Transition in Liquid Semiconductors" @default.
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- W2113131874 doi "https://doi.org/10.1002/bbpc.19760800830" @default.
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