Resonant Enhancement of Inelastic Light Scattering in the Fractional Quantum Hall Regime at $\nu=1/3$

TL;DR

This paper reports strong resonant enhancements in inelastic light scattering at the fractional quantum Hall state $ u=1/3$, linking these effects to charged excitonic states and proposing a three-step scattering mechanism.

Contribution

It introduces a novel interpretation of resonant enhancement profiles in light scattering via charged excitonic intermediate states in the fractional quantum Hall regime.

Findings

Resonant enhancements coincide with charged exciton photoluminescence energies.

Sharp peaks with FWHM less than 0.2 meV observed in scattering profiles.

Proposed three-step scattering mechanism involving charged excitonic states.

Abstract

Strong resonant enhancements of inelastic light scattering from the long wavelength inter-Landau level magnetoplasmon and the intra-Landau level spin wave excitations are seen for the fractional quantum Hall state at $\nu = 1/3$. The energies of the sharp peaks (FWHM $\lesssim 0.2meV$) in the profiles of resonant enhancement of inelastic light scattering intensities coincide with the energies of photoluminescence bands assigned to negatively charged exciton recombination. To interpret the observed enhancement profiles, we propose three-step light scattering mechanisms in which the intermediate resonant transitions are to states with charged excitonic excitations.