Phenomenological line-shape analysis of cyclotron-resonance-induced conductivity of electrons on liquid helium

Low-frequency magnetoconductivity measurements of two-dimensional surface e lectrons on liquid He-4 under cyclotron resonance conditions are reported h ere. At relatively low-electron densities, the cyclotron-resonance-induced conductivity line shape is a phenomenological combination of two resonances , which can be separated by fitting. The resonance which shows a decrease o f the effective scattering Lime tau(eff) with increasing driving field is s tudied here: the observed shift of the resonance, the resonance linewidth a nd the effective scattering frequency. It is found that the extracted tau(e ff) has a similar electric driving field dependence as published experiment al results from zero-magnetic field, de time-of-flight measurements.