Giant quantum oscillations of magnetic Landau damping in aluminum

The effect of quantization of the electron energy in a magnetic field on the collisionless damping of radio-frequency modes in aluminum has been investigated theoretically. In the geometry where a propagation vector $\mathbf{k}$ and a constant magnetic field $\mathbf{H}$ are directed along the $C_4$ axis in aluminum there is a magnetic Landau damping caused by electrons whose orbits are inclined to the transverse plane. Despite a relatively low concentration of electrons, this damping can significantly affect the damping of a helicon and a doppleron. It has been shown that the quantization of the electron energy leads to giant oscillations of the damping of these modes.