CondMat for Dummies: Spin symmetry groups

Datum

29.05.2026

Zeit

17:00 - 18:00

Sprecher

Jan Priessnitz

Zugehörigkeit

MPI-PKS

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Beschreibung

In this lecture, I will introduce the theoretical foundation behind altermagnets and unconventional magnetism, the concept of spin symmetries. Spin symmetries are used to describe magnetic systems in the nonrelativistic approximation, contrary to much longer-used magnetic symmetries, which also take relativistic spin-orbit coupling into account, but cannot see the difference between antiferromagnets and altermagnets. In the first half of the talk, I will introduce key aspects of crystal, spin and magnetic symmetries, together with some physical intuition which should make these concepts easier to grasp. I will show how symmetries can be used to classify materials and, most importantly, demonstrate their usefulness in qualitatively determining a wide range of material properties, such as linear-response susceptibilities. In the second half, we will examine several example materials together, try to classify them in terms of spin symmetries and see what kind of physical insight can be obtained from this.

Letztmalig verändert: 29.05.2026, 07:38:02