The magnetoresistance oscillations in high-mobility two-dimensional electron systems induced by two radiation fields of frequencies 31 GHz and 47 GHz, are analyzed in a wide magnetic-field range down to 100 G, using the balance-equation approach to magnetotransport for high-carrier-density systems. The frequency mixing processes are shown to be important. The predicted peak positions, relative heights, radiation-intensity dependence and their relation with monochromatic resistivities are in good agreement with recent experimental finding [M. A. Zudov {\it et al.} Phys. Rev. Lett. 96, 236804 (2006)].
@article{arxiv.cond-mat/0608655,
title = {Magnetoresistance oscillations in two-dimensional electron systems under monochromatic and bichromatic radiations},
author = {X. L. Lei and S. Y. Liu},
journal= {arXiv preprint arXiv:cond-mat/0608655},
year = {2007}
}