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Teoreticheskaya i Matematicheskaya Fizika, 1972, Volume 10, Number 1, Pages 123–126
(Mi tmf2645)
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Intersection of phonon spectrum branches
V. K. Tkachenko
Abstract:
A study is made of the phonon spectrum of a simple crystal lattice as a whole. Topological
methods show that, the quasilongitudlnal branch, which is isolated at long wavelengths,
must intersect one of the other branches of the spectrum at sufficiently short wavelengths.
Received: 14.12.1970
Citation:
V. K. Tkachenko, “Intersection of phonon spectrum branches”, TMF, 10:1 (1972), 123–126; Theoret. and Math. Phys., 10:1 (1972), 81–83
Linking options:
https://www.mathnet.ru/eng/tmf2645 https://www.mathnet.ru/eng/tmf/v10/i1/p123
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