Exchange-correlation enhancement of the Lande-g* factor in integer quantized Hall plateaus

TL;DR

This paper investigates how many-body exchange and correlation effects influence the spatial structure of incompressible strips in a 2DEG under strong magnetic fields, revealing a widening of odd-integer quantum Hall plateaus.

Contribution

It introduces a detailed analysis of exchange-correlation effects on quantum Hall edge states using the Thomas-Fermi-Poisson approximation.

Findings

Odd-integer incompressible strips are widened by many-body effects.

Even-integer incompressible strips are largely unaffected.

Exchange-correlation interactions significantly impact quantum Hall edge structures.

Abstract

We study the emergent role of many-body effects on a two dimensional electron gas (2DEG) within the Thomas-Fermi-Poisson approximation, including both the exchange and correlation interactions in the presence of a strong perpendicular magnetic field. It is shown that, the indirect interactions widen the odd-integer incompressible strips spatially, whereas the even-integer filling factors almost remain unaffected.