Fermi-liquid effects in propagation of low frequency electromagnetic waves through thin metal films*

In the present work we theoretically analyze the contribution from a transverse Fermi-liquid collective mode to the transmission of electromagnetic waves through a thin film of a clean metal in the presence of a strong external magnetic field. We show that at the appropriate Fermi surface geometry the transverse Fermi-liquid wave may appear in conduction electrons liquid at frequencies $ \omega $ significantly smaller than the cyclotron frequency of charge carriers $ \Omega $ provided that the mean collision frequency $ \tau^{-1}$ is smaller than $\omega. $ Also, we show that in realistic metals size oscillations in the transmission coefficient associated with the Fermi-liquid mode may be observable in experiments. Under certain conditions these oscillations may predominate over the remaining size effects in the transmission coefficient.