Abstract
The authors demonstrate the possibility of oscillations of the electronic sound absorption in non-degenerate semiconductors with a superlattice placed in a magnetic field. The process is as follows. The Landau level is broadened so that its breadth equals the width of the lowest mini-band. Making the top of one Landau zone coincide with the bottom of another causes the resonant transition of electrons with phonon absorption to take place. This process causes large-amplitude oscillations of the absorption coefficient with changing magnetic field.
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