Cyclotron Damping of Magnetoplasma Waves in Bismuth Due to Mode Mixing

Abstract

There are two modes in magnetoplasma waves in bismuth. One mode rotates in the sense of hole cyclotron motion and the other in electron sense. The weak damping has been observed at the neighbourhood of hole cyclotron field in the latter mode, although it is expected to be insensitive to hole motion in the local scheme. This effect has been interpreted in terms of the little admixture of the hole sensitive mode due to nonlocal effect. This mode mixing cyclotron damping occurs at ω+qv_F>ω_c>ω−qv_F. With use of this relation, the Fermi velocity as well as cyclotron mass of holes in bismuth has been determined from the observed damping region.