Ferromagnetic correlations in quasi-one-dimensional conducting channels

TL;DR

This paper presents a model explaining spontaneous spin polarization in quasi-one-dimensional GaAs/AlGaAs channels, highlighting ferromagnetic order as a generic property influenced by external conditions like gate voltage, magnetic field, and temperature.

Contribution

It introduces a theoretical model linking ferromagnetic order to quasi-one-dimensional channels within a Wigner crystal, explaining experimental observations.

Findings

Ferromagnetic order is a natural property of quasi-one-dimensional channels.

Conductance depends on gate voltage, magnetic field, and temperature.

The model aligns with experimental data on spin polarization.

Abstract

We propose a model which explains the experimental observation of spontaneous spin polarization of conducting electrons in quasi- one-dimensional GaAs/AlGaAs channels. We show that a ferromagnetic order is a generic property of a quasi-one-dimensional conducting channel embedded in a Wigner crystal. We also discuss gate voltage, magnetic field and temperature dependences of the channel's conductance.