Regensburg 2025 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 9: Altermagnets I

MA 9.11: Vortrag

Montag, 17. März 2025, 17:45–18:00, H20

First-principles calculations of Luttinger ferrimagnets — •Jan Priessnitz¹, Igor Mazin², and Libor Šmejkal¹ — ¹Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany — ²Department of Physics and Astronomy, and Quantum Science and Engineering Center, George Mason University, Fairfax, VA, USA

The discovery of altermagnets demonstrated that it is possible to have a material with zero net magnetization, but broken Kramers' spin degeneracy and large spin-splitting, even without considering relativistic effects (spin-orbit coupling) [1]. The altermagnetic spin polarization promises applications in the field of spintronics.

Apart from altermagnets, there are several other classes of magnets showing such properties, such as the Luttinger compensated ferrimagnets. These are materials containing two or more magnetic sublattices which are not connected by symmetry, but which perfectly compensate each other by the virtue of Luttinger's theorem [2].

In this talk, we will give a brief introduction into Luttinger compensated ferrimagnets and present first-principle calculations of several candidate materials and unconventional properties not seen in conventional magnetic materials.

[1] Šmejkal, L., Sinova, J., & Jungwirth, T. (2022). Physical Review X, 12(3).

[2] Mazin, I. (2022). Editorial, Physical Review X, 12(4).

Keywords: unconventional magnets; altermagnets; ferrimagnets; ab-initio; Luttinger's theorem