Abstract
We give a complete description of the scaling behavior of the integrated density of states of random harmonic chains with random masses near the band edgeω max and near special frequenciesω s. There are four different situations:ω ↑ω max,ω ↓ω s,ω ↑ω s (critical case),ω ↑ω s (general case). Our analytic results have the form of infinite sums involving Fourier coefficients of the scaling behavior of the Dyson-Schmidt functionat the special frequency or the band edge. Binary mass distributions are considered in detail in the limit of a small fractionp of light masses. Our predictions are compared with extensive numerical data.
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Nieuwenhuizen, T.M., Luck, J.M. Lifshitz singularities in random harmonic chains: Periodic amplitudes near the band edge and near special frequencies. J Stat Phys 48, 393–424 (1987). https://doi.org/10.1007/BF01019680
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DOI: https://doi.org/10.1007/BF01019680