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- W4245674313 abstract "Results are presented for phonons in a 1D diatomic model superlattice. Each frequency omega corresponds to two Bloch wavenumbers Q1 and Q2. For alpha <0.25, where alpha is the ratio of next-nearest to nearest force constants, the results are essentially a perturbation of those found with nearest-neighbour forces only. For alpha >0.25, however, qualitatively new results are found, and in particular both Q1 and Q2 can be real over some frequency range. Illustrative dispersion curves are presented." @default.
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- W4245674313 date "1991-12-02" @default.
- W4245674313 modified "2023-09-23" @default.
- W4245674313 title "Next-nearest neighbour forces in diatomic superlattices" @default.
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- W4245674313 doi "https://doi.org/10.1088/0953-8984/3/48/011" @default.
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