Magnetoresistance oscillations due to internal Landau band structure of a two-dimensional electron system in a periodic magnetic field - art. no. 041303

We report alternative types of magnetoresistance oscillations in high mobil ity two-dimensional electron systems subjected to large amplitude one-dimen sional periodic magnetic modulations, of period 500 nm to 1 Am. We observe Shubnikov-de Haas oscillations that are strongly modified in amplitude and phase, Hall resistance oscillations. and aperiodic magnetoresistance oscill ations. These effects are shown to arise from the internal structure of ove rlapping Landau bands and are well accounted for by perturbation calculatio ns.