Photoluminescence Detected Doublet Structure in the Integer and Fractional Quantum Hall Regime

TL;DR

This paper reports polarized magneto-photoluminescence measurements revealing a doublet structure in the quantum Hall regime, suggesting the presence of magneto-roton minima and strong electronic correlations even in the integer quantum Hall effect.

Contribution

It provides experimental evidence of a doublet structure linked to magneto-roton minima, highlighting strong correlations in the quantum Hall regime.

Findings

Doublet structure observed over a wide magnetic field range

Evidence for magneto-roton minima in the charged density waves

Indication of strong electronic correlations in IQHE

Abstract

We present here the results of polarized magneto-photoluminescence measurements on a high mobility single-heterojunction. The presence of a doublet structure over a large magnetic field range (2>nu>1/6) is interpreted as possible evidence for the existence of a magneto-roton minima of the charged density waves. This is understood as an indication of strong electronic correlation even in the case of the IQHE limit.