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HL: Fachverband Halbleiterphysik

HL 18: Quantum Hall Effect

HL 18.4: Vortrag

Montag, 14. März 2011, 15:15–15:30, POT 151

Theory of the microwave induced zero resistance states in two-dimensional electron systems — •Sergey Mikhailov — Institute of Physics, University of Augsburg, D-86135 Augsburg, Germany

The microwave induced zero resistance states [1] and microwave induced resistance oscillations [2] were discovered in the very-high-electron-mobility GaAs/AlGaAs quantum-well systems about ten years ago but have not been understood so far. We show [3] that this phenomenon is explained by the influence of the nonlinear ponderomotive forces which arise in the near-contact regions of the two-dimensional electron gas under the action of microwaves. The theory [3] agrees with all accumulated experimental facts and provides a simple and natural explanation of the frequency, polarization, magnetic field, mobility, power and temperature dependencies of the observed effects.

[1] R. G. Mani et al., Nature 420, 646 (2002); M. A. Zudov et al., Phys. Rev. Lett. 90, 046807 (2003)

[2] M. A. Zudov et al., Phys. Rev. B. 64, 201311 (2001); P. D. Ye et al., Appl. Phys. Lett. 79, 2193 (2001)

[3] S. A. Mikhailov, arXiv:1011.1094v1 (4 Nov 2010)