# Measuring hole g-factor anisotropies using transverse magnetic focusing

## TL;DR

This paper proposes a method using transverse magnetic focusing to measure the anisotropy of the g factor in heavy hole systems, providing a practical approach to quantify anisotropic spin properties.

## Contribution

It introduces a novel measurement technique for g factor anisotropy in heavy hole gases using TMF, demonstrating its feasibility and insensitivity to spin-orbit interactions.

## Key findings

- g factor anisotropy causes measurable variations in TMF spectra
- The method is effective at accessible magnetic fields
- The approach is robust against additional spin-orbit effects

## Abstract

Recent theoretical and experimental results from quasi-one dimensional heavy hole systems have suggested that heavy hole gases have a strongly anisotropic g factor. In this theoretical paper, we propose a method for measuring this anisotropy using transverse magnetic focusing (TMF). We demonstrate that for experimentally accessible fields, the g factor anisotropy leads to a relative variation in the characteristic of spin-splitting of the TMF spectrum which allows for the measurement of the anisotropy of the g factor. We show that this variation is insensitive to additional spin-orbit interactions, and is resolvable with current devices.