Temperature dependences of sound absorption and dispersion associated with Fermi-surface plateaus
N. A. StepanovaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovA. I. KopeliovichPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
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It is shown that Fermi surface plateaus (points, lines, and sections of zero curvature) result in temperature dependences of the sound absorption and dispersion in the “collision-free” domain kl>1. The temperature and frequency dependences characteristic for different kinds of plateaus are considered.
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