Theory of Striped Hall Ferromagnets

TL;DR

This paper investigates the stability and collective excitations of spin and charge striped states in half-filled high Landau levels, revealing ferromagnetic stripes as the most stable configuration in the zero Zeeman energy limit.

Contribution

It introduces a Hartree-Fock analysis comparing ferromagnetic and antiferromagnetic striped states, highlighting the ferromagnetic state's stability and calculating their collective excitations.

Findings

Ferromagnetic striped Hall state is more stable than other striped states.

Collective excitations are characterized using the single mode approximation.

The study focuses on the zero Zeeman energy limit.

Abstract

We study spin and charge striped states at the half-filled high Landau level in the zero Zeeman energy limit using a Hartree-Fock approximation. It is shown that a ferromagnetic striped Hall state is more stable than the antiferromagnetic striped state or charge striped state. We calculate the collective excitations using the single mode approximation.