Theory of collisionless sound absorption in stochastic magnetic breakdown

A consistent theory of sound absorption under stochastic magnetic breakdown (SMB) and a strong spatial dispersion is constructed. The analysis is carried out in the limit when the sound wavelength is larger than the characteristic Larmor radius. The SMB absorption of sound is studied for closed electronic, open periodic, and highly elongated MB configurations, obtained from open configurations when the magnetic field H deviates from certain chosen planes by a small angle θ. It is shown that for a typical narrow layer of MB configurations, the collisionless nature of sound absorption may be violated by dissipative processes that are characteristic of the SMB and are not related to the real electron relaxation mechanism. Among other things, this leads to an anomalously sharp dependence of the sound absorption on the angle θ ≪ 1 and the angle φ (for φ ≪ 1) between H and the sound wave vector.

Перевод пока недоступен