Non-linear magnetotransport in microwave-illuminated two-dimensional electron systems

Details Non-linear magnetotransport in microwave-illuminated two-dimensional electron systems Non-linear magnetotransport in microwave-illuminated two-dimensional electron systems

2008-04-18

arxiv.org/abs/0804.3093v2

PHYSICAL REVIEW B 77, 201304(R) (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.77.201304

We study magnetoresistivity oscillations in a high-mobility two-dimensional electron system subject to both microwave and dc electric fields. First, we observe that the oscillation amplitude is a periodic function of the inverse magnetic field and is strongly suppressed at microwave frequencies near half-integers of the cyclotron frequency. Second, we obtain a complete set of conditions for the differential resistivity extrema and saddle points. These findings indicate the importance of scattering without microwave absorption and a special role played by microwave-induced scattering events antiparallel to the electric field.

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