Nonlinear acoustic phenomena in superconductors with paramagnetic impurities
V. P. Galaı̆koPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovN. I. GlushchukPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovV. S. ShumeĭkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
ABI
Аннотация
Effects on paramagnetic impurities on the nonlinear attenuation of short-wavelength longitudinal sound and on generation of acoustic harmonics in pure superconductors are considered. The acoustic nonlinearity results from strong nonequilibrium of the electron system which is formed due to Andreev’s mechanism for the dragging of resonance excitations by the sound wave field.
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