University of Minnesota
School of Physics & Astronomy
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Peter Martin

Shubnikov–de Haas oscillations in a two-dimensional electron gas under subterahertz radiation
Q. Shi, P. D. Martin, A. T. Hatke, M. A. Zudov, J. D. Watson, G. C. Gardner, M. J. Manfra, L. N. Pfeiffer, and K. W. West, Phys. Rev. B - Rapid Communications 91, 081405(R) (2015)

Download from http://dx.doi.org/10.1103/PhysRevB.92.081405

Abstract

We report on magnetotransport measurements in a two-dimensional (2D) electron gas subject to subterahertz radiation in the regime where Shubnikov–de Haas oscillations (SdHOs) and microwave-induced resistance oscillations (MIROs) coexist over a wide magnetic field range, spanning several harmonics of the cyclotron resonance. Surprisingly, we find that the SdHO amplitude is modified by the radiation in a nontrivial way, owing to the oscillatory correction which has the same period and phase as MIROs. This finding challenges our current understanding of microwave photoresistance in 2D electron gas, calling for future investigations.