NOVEL MAGNETORESISTANCE OSCILLATIONS IN SHORT-PERIOD LATERAL SUPERLATTICES

We have investigated magnetotransport through two-dimensional lateral superlattices with periods a of 100 and 120 nm prepared on a shallow, high mobility heterojunction. Measurements of the longitudinal and Hal l resistance were carried out at a temperature of 50 mK with the bias voltage of the top gate as parameter. The longitudinal resistance disp lays an unprecedented richness in oscillatory features of both semicla ssical and quantum mechanical origin. The results are discussed on the basis of the zero field miniband energy spectrum and the subband spli tting of single Landau-levels. (C) 1998 Elsevier Science B.V. All righ ts reserved.