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arXiv · 1011.5251

Sub-linear radiation power dependence of photo-excited resistance oscillations in two-dimensional electron systems

Jesus Inarrea·R. G. Mani·W. Wegscheider
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Abstract

We find that the amplitude of the $R_{xx}$ radiation-induced magnetoresistance oscillations in GaAs/AlGaAs system grows nonlinearly as $A \propto P^α$ where $A$ is the amplitude and the exponent $α< 1$. %, with $α\rightarrow 1/2$ in %the low temperature limit. This striking result can be explained with the radiation-driven electron orbits model, which suggests that the amplitude of resistance oscillations depends linearly on the radiation electric field, and therefore on the square root of the power, $P$. We also study how this sub-linear power law varies with lattice temperature and radiation frequency.

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Jesus Inarrea, R. G. Mani, W. Wegscheider. 2010-11-23. Sub-linear radiation power dependence of photo-excited resistance oscillations in two-dimensional electron systems. https://doi.org/10.1103/physrevb.82.205321

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