Quantum oscillations in the microwave magnetoabsorption of a 2D electron gas

Details Quantum oscillations in the microwave magnetoabsorption of a 2D electron gas Quantum oscillations in the microwave magnetoabsorption of a 2D electron gas

2010-06-02

arxiv.org/abs/1006.0319v1

Phys. Rev. B 81, 201302(R) (2010), see also http://physics.aps.org/synopsis-for/10.1103/PhysRevB.81.201302

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 4 figures

Scientific paper

10.1103/PhysRevB.81.201302

We report on the experimental observation of the quantum oscillations in microwave magnetoabsorption of a high-mobility two-dimensional electron gas induced by Landau quantization. Using original resonance-cavity technique, we observe two kinds of oscillations in the magnetoabsorption originating from inter-Landau-level and intra-Landau-level transitions. The experimental observations are in full accordance with theoretical predictions. Presented theory also explains why similar quantum oscillations are not observed in transmission and reflection experiments on high-mobility structures despite of very strong effect of microwaves on the dc resistance in the same samples.

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