Interference of commensurate and microwave-induced oscillations of the magnetoresistance of a two-dimensional electron gas in a one-dimensional lateral superlattice

The influence of microwave radiation on the low-temperature magnetotransport of two-dimensional electrons in a one-dimensional lateral superlattice fabricated on the basis of a selectively doped GaAs/AlAs heterojunction has been investigated. It has been found that the resistance of the two-dimensional electron gas in this superlattice changes under the action of microwave radiation more substantially at the minima of commensurate oscillations than at the maxima. The experimental data demonstrate “interference” of classical commensurate magnetoresistance oscillations and quantum microwave-induced oscillations.