Helicon-phonon resonance in bismuth

The possibility of helicon-phonon resonance occurring in a bismuth crystal is demonstrated. This resonance should be observed in the range of short radio waves propagating in a bismuth crystal in a constant magnetic field H aligned parallel to the bisecting axis directed along the normal to the surface of the crystal plate. The resonance is caused by the deformation interaction of holes with an acoustic wave. It is revealed that the helicon-phonon resonance occurs in relatively weak magnetic fields (of the order of several tens of oersteds) under the condition where spatial inhomogeneity of the wave field is immaterial for the electrons but significant for the holes.