Thermodynamics of Quantum Hall Ferromagnets

TL;DR

This paper provides a theoretical analysis of the thermodynamic properties of quantum Hall ferromagnets at Landau level filling factor ν=1, focusing on temperature effects on spin magnetization and the interplay of collective and single-particle phenomena.

Contribution

It introduces a many-body perturbation theory approach to study thermodynamics of quantum Hall ferromagnets and explores their temperature-dependent spin magnetization behavior.

Findings

Temperature dependence of spin magnetization analyzed

Interplay of collective and single-particle physics discussed

Opportunities for understanding itinerant electron ferromagnetism highlighted

Abstract

The two-dimensional interacting electron gas at Landau level filling factor $\nu =1$ and temperature $T=0$ is a strong ferromagnet; all spins are completely aligned by arbitrarily weak Zeeman coupling. We report on a theoretical study of its thermodynamic properties using a many-body perturbation theory approach and concentrating on the recently measured temperature dependence of the spin magnetization. We discuss the interplay of collective and single-particle aspects of the physics and the opportunities for progress in our understanding of itinerant electron ferromagnetism presented by quantum Hall ferromagnets.