Bernstein modes and giant microwave response of two-dimensional electron system

Abstract

We report on a new contribution to the microwave response of a two-dimensional electron system in magnetic field which originates from excitation of virtual Bernstein modes. These collective modes emerge as a result of interaction between usual magnetoplasmon mode and cyclotron resonance harmonics. The electrons are found to experience a strongly enhanced radiation field when its frequency falls in a gap of the Bernstein modes spectrum. This field can give rise to nonlinear effects, one of which, the parametric cyclotron resonance, is discussed. We argue that this resonance leads to a plasma instability in the ultraclean system. The instability-induced heating is responsible for the giant photoresistivity spike recently observed in the vicinity of the 2nd cyclotron resonance harmonic.

5 pages, 3 figures. Published version

References in corpus (7)

• Ultrastrong coupling of the cyclotron transition of a two-dimensional electron gas to a THz metamaterial
• Nonequilibrium phenomena in high Landau levels
• Giant microwave photoresistivity in a high-mobility quantum Hall system
• Influence of contacts on the microwave response of a two-dimensional electron stripe
• Non-linear response of a high mobility two-dimensional electron system near the second harmonic of the cyclotron resonance
• Microwave-induced off-resonance giant magnetoresistance in ultraclean two-dimensional electron systems
• Parametric amplification of magnetoplasmons in semiconductor quantum dots

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• The photoresponse of a two-dimensional electron gas at the second harmonic of the cyclotron resonance
• Theoretical model for negative giant magnetoresistance in ultra-high-mobility 2D electron systems
• Hall field-induced resistance oscillations in MgZnO/ZnO heterostructures
• Fine structure of high-power microwave-induced resistance oscillations
• Microwave-induced zero-resistance" states and second-harmonic generation in an ultraclean two-dimensional electron gas
• Observation of High Harmonics of the Cyclotron Resonance in Microwave Transmission of a High-Mobility Two-Dimensional Electron System
• Undamped relativistic magnetoplasmons in lossy two-dimensional electron systems
• Testing the tomographic Fermi liquid hypothesis with high-order cyclotron resonance
• Shear Bernstein modes in a two-dimensional electron liquid
• Resonance peak shift in the photo-current of ultrahigh-mobility two-dimensional electron systems
• Low-energy excitations in multiple modulation-doped CdTe/(CdMg)Te quantum wells
• Strongly nonlinear Bernstein modes in graphene reveal plasmon-enhanced near-field magnetoabsorption
• Equatorial magnetoplasma waves
• Ballistic-to-hydrodynamic transition and collective modes for two-dimensional electron systems in magnetic field