High frequency properties of a quasi-two-dimensional conductive film
Faculty of Natural Sciences, Institute of Physics, Skopje, R. Macedonia
Revised: 1 March 2005
Published online: 6 July 2005
The propagation of a monochromatic longitudinal acoustic wave along the low conductivity axis of a thin quasi-two-dimensional conductive film, in the absence of an external magnetic field, is studied theoretically. It is shown that under certain conditions the formation of both a standing ordinary wave (OAW) and an anomalous acoustic wave (AAW) is possible. The frequency dependence of the amplitudes of both waves is derived. For certain values of the characteristic parameters, the AAW in the film may be dominant. From the resonance conditions for the formation of standing OAW and AAW waves (especially the AAW), it is possible to obtain information about the electronic structure of the quasi-two-dimensional conductors, e.g. the corrugation parameter η or the relaxation properties of the charge carriers.
PACS: 72.10.-d – Theory of electronic transport; scattering mechanisms / 72.30.+q – High-frequency effects; plasma effects / 72.50.+b – Acoustoelectric effects
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005