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arXiv · 1011.4233

Nonlinear growth with the microwave intensity in radiation-induced magnetoresistance oscillations

R. G. Mani·C. Gerl·S. Schmult·W. Wegscheider·V. Umansky
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Abstract

We report the observation of inverse-magnetic-field-periodic, radiation-induced magnetoresistance oscillations in GaAs/AlGaAs heterostructures prepared in W. Wegscheider's group, compare their characteristics with similar oscillations in V. Umansky's material, and describe the lineshape variation vs. the radiation power, $P$, in the two systems. We find that the radiation-induced oscillatory $ΔR_{xx}$, in both materials, can be described by $ΔR_{xx} = -A exp(-λ/B)sin(2 πF/B)$, where $A$ is the amplitude, $λ$ is the damping parameter, and $F$ is the oscillation frequency. Both $λ$ and $F$ turn out to be insensitive to $P$. On the other hand, $A$ grows nonlinearly with $P$.

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R. G. Mani, C. Gerl, S. Schmult, W. Wegscheider, V. Umansky. 2010-11-18. Nonlinear growth with the microwave intensity in radiation-induced magnetoresistance oscillations. https://doi.org/10.1103/physrevb.81.125320

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