Photovoltaic Oscillations Due to Edge-Magnetoplasmon Modes in a Very-High Mobility 2D Electron Gas

Abstract

Using very-high mobility GaAs/AlGaAs 2D electron Hall bar samples, we have experimentally studied the photoresistance/photovoltaic oscillations induced by microwave irradiation in the regime where both 1/B and B-periodic oscillations can be observed. In the frequency range between 27 and 130 GHz we found that these two types of oscillations are decoupled from each other, consistent with the respective models that 1/B oscillations occur in bulk while the B-oscillations occur along the edges of the Hall bars. In contrast to the original report of this phenomenon (Ref. 1) the periodicity of the B-oscillations in our samples are found to be independent of L, the length of the Hall bar section between voltage measuring leads.

4 pages, 4 figures

References in corpus (3)

• Theory of microwave-induced oscillations in the magnetoconductivity of a 2D electron gas
• Influence of contacts on the microwave response of a two-dimensional electron stripe
• Propagation of edge magnetoplasmons in semiconductor quantum-well structures

Cited by in corpus (3)

• Phase study of oscillatory resistances in microwave-irradiated- and dark- GaAs/AlGaAs devices: Indications of a new class of integral quantum Hall effect
• Non-linear magnetotransport in microwave-illuminated two-dimensional electron systems
• Nonlinear resistance of 2D electrons in crossed electric and magnetic fields