Collective Excitations Spectrum in Density Modulated One-Dimensional Electron Gas in a Magnetic Field

TL;DR

This paper investigates the collective excitation spectrum of a density-modulated, quasi-one-dimensional electron gas under a magnetic field, revealing oscillatory magnetoplasmon behaviors influenced by magnetic field strength.

Contribution

It derives the intra- and inter-band magnetoplasmon spectra for a density-modulated 1DEG in a magnetic field using the SCF approach, highlighting oscillatory behaviors.

Findings

Intra-Landau-band magnetoplasmon spectrum exhibits oscillations.

Oscillations are non-constant in period with respect to 1/B.

Oscillations are significantly affected at low magnetic fields.

Abstract

We determine the collective excitations spectrum and discuss the numerical results for a parabolically confined density modulated quasi-one dimensional electron gas (1DEG) in the presence of an external magnetic field. We derive the inter-and intra-band magnetoplasmon spectrum within the Self Consistent Field (SCF) approach. In this work we focus on magnetoplasmon oscillations in this system and as such results are presented for the intra-Landau-band magnetoplasmon spectrum that exhibits oscillatory behavior, these oscillations are not with constant period in 1/B and are significantly effected at low B and corresponding high 1/B.