Domain Textures in the Fractional Quantum Hall Effect

TL;DR

This paper investigates how domain textures affect neutral excitations in fractional quantum Hall systems, revealing that large quantum fluid domains support dispersive collective modes, providing insights into strong electron correlations.

Contribution

It demonstrates that large domains in FQHE support well-defined dispersive neutral modes, bridging experimental observations with uniform phase theories.

Findings

Large domains support long-wavelength neutral excitations.

Dispersive modes can be interpreted by uniform phase theories.

Experimental access to strong correlation physics is enhanced.

Abstract

Impacts of domain textures on low-lying neutral excitations in the bulk of fractional quantum Hall effect (FQHE) systems are probed by resonant inelastic light scattering. We demonstrate that large domains of quantum fluids support long-wavelength neutral collective excitations with well-defined wave vector (momentum) dispersion that could be interpreted by theories for uniform phases. Access to dispersive low-lying neutral collective modes in large domains of FQHE fluids such as long wavelength magnetorotons at filling factor v=1/3 offer significant experimental access to strong electron correlation physics in the FQHE.