Influence of retardation effects on 2D magnetoplasmon spectrum

TL;DR

This paper investigates how retardation effects influence the magnetoplasmon spectrum in 2D electron systems under magnetic fields, showing theoretical predictions align with recent experimental results.

Contribution

It provides a theoretical analysis of retardation effects on 2D magnetoplasmon spectra and confirms predictions with experimental data.

Findings

Magnetoplasmon spectrum intersects cyclotron resonance line

Spectrum approaches light dispersion relation at high fields

Experimental results confirm theoretical predictions

Abstract

Within dissipationless limit the magnetic field dependence of magnetoplasmon spectrum for unbounded 2DEG system found to intersect the cyclotron resonance line, and, then approaches the frequency given by light dispersion relation. Recent experiments done for macroscopic disc-shape 2DEG systems confirm theory expectations.