Spike-like transport sound pulses in metals in the vicinity of acoustic cyclotron resonance

The electron mechanism for the transport of sound pulses in metals is investigated, involving the formation of a dynamic spike-like pattern in the vicinity of acoustic cyclotron resonance. It is shown that as a consequence of the strong nonmonotonic renormalization of the velocity of sound, when the condition ω0τ≫k0R≫1 is satisfied (ω0 is the sound frequency, k0 is the wave vector of the sound, τ is the relaxation time, and R is the cyclotron radius), the spikes of the sound field are found to be comparable with the magnitude of the main signal, but their amplitude falls slowly with spatial separation from the moving sound pulse. The amplitudes of the earlier and later sound pulses, and also their attenuation are determined by the local value of the deformation potential at the point of effective interaction with the sound.

Перевод пока недоступен