Quantized Dispersion of Two-Dimensional Magnetoplasmons Detected by Photoconductivity Spectroscopy
S. Holland, Ch. Heyn, D. Heitmann, E. Batke, R. Hey, K. J. Friedland,, and C. -M. Hu
TL;DR
This paper reports the discovery of quantized dispersion in two-dimensional magnetoplasmons, detected via photoconductivity spectroscopy, revealing a new link between magnetoplasmon behavior and the quantum Hall effect.
Contribution
It introduces a novel observation of filling-factor dependent plateau dispersion in 2D magnetoplasmons, connecting collective excitations with quantum Hall physics.
Findings
Plateau-type dispersion observed in magnetoplasmons
Deviation from semiclassical behavior in high-mobility systems
Revealed a new relation between magnetoplasmons and quantum Hall effect
Abstract
We find that the long-wavelength magnetoplasmon, resistively detected by photoconductivity spectroscopy in high-mobility two-dimensional electron systems, deviates from its well-known semiclassical nature as uncovered in conventional absorption experiments. A clear filling-factor dependent plateau-type dispersion is observed that reveals a so far unknown relation between the magnetoplasmon and the quantum Hall effect.
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