Far-infrared transmission study of Bernstein modes in a two-dimensional electron gas with a tunable lateral modulation

Lefebvre, Julie; Beerens, J.; Feng, Y.; Wasilewski, Z. R.; Beauvais, J.; Lavallée, Éric

doi:10.1116/1.581065

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2007

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“…involving Bernstein modes. 29,30,31 In addition the resistance of 2DEG plays a selective role by being largely insensitive to absorption processes other than those responsible for MIRO. This is due to the highly degenerate nature of the 2DEG (E F >> k B T ).…”

Section: Methodsmentioning

confidence: 99%

Frequency quenching of microwave-induced resistance oscillations in a high-mobility two-dimensional electron gas

et al. 2007

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The frequency dependence of microwave induced resistance oscillations (MIROs) has been studied experimentally in high-mobility electron GaAs/AlGaAs structures to explore the limits at which these oscillations can be observed. It is found that in dc transport experiments at frequencies above 120 GHz MIROs start to quench while above 230 GHz they completely disappear. The results will need to be understood theoretically but are qualitatively discussed within a model in which forced electronic charge oscillations (plasmons) play an intermediate role in the interaction process between the radiation and the single particle electron excitations between Landau levels.

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Section: Methodsmentioning

confidence: 99%