# Spin- and angle-resolved photoemission on topological materials

## TL;DR

This review provides an overview of spin- and angle-resolved photoemission studies on topological materials, focusing on topological insulators and semimetals, explaining key measurement principles and spin effects.

## Contribution

It offers a comprehensive overview of experimental techniques and findings in spin-resolved photoemission on topological materials, including explanations of spin polarization and interference effects.

## Key findings

- Measured spin polarization should sum to 100%.
- Spin interference effects influence measured spin textures.
- The review covers topological insulators and semimetals.

## Abstract

A historical review of spin- and angle-resolved photoemission on topological materials is presented, aimed at readers who are new to the field or who wish to obtain an overview of the activities in the field. The main focus lies on topological insulators, but also Weyl and other semimetals will be discussed. Further it will be explained why the measured spin polarisation from a spin polarised state should always add up to 100% and how spin interference effects influence the measured spin texture.