Cyclotron resonance lineshape in a Wigner crystal

TL;DR

This paper calculates the cyclotron resonance lineshape in a Wigner crystal, showing a transition from double to single peak spectra with increasing filling factor, and aligns well with experimental data.

Contribution

It introduces a model incorporating spin-splitting effects via substitutional disorder and uses the coherent potential approximation to analyze the resonance spectrum.

Findings

Transition from double to single peak spectrum at filling factors around 1/6

Good agreement with experimental observations

Influence of dipole-dipole interactions, radiation damping, and scattering

Abstract

The cyclotron resonance absorption spectrum in a Wigner crystal is calculated. Effects of spin-splitting are modelled by substitutional disorder, and calculated in the coherent potential approximation. Due to the increasing strength of the dipole-dipole interaction, the results show a crossover from a double-peak spectrum at small filling factors to a single-peak spectrum at filling factors $\agt 1/6$. Radiation damping and magnetophonon scattering can also influence the cyclotron resonance. The results are in very good agreement with experiments.