Lifshitz singularities in the total and
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Th.M. Nieuwenhuizen; J.M. Luck
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Article
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1987
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Elsevier Science
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English
β 969 KB
Lifshitz has shown that the density of states of random systems becomes exponentially small near the band edge. We perform a detailed computation in a one-dimensional system and calculate the periodic prefactor of this essential singularity. The analysis is extended to the wavenumberdependent spectr