Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 9: Altermagnets I
MA 9.13: Talk
Monday, March 17, 2025, 18:15–18:30, H20
Altermagnetism in twisted magnetic bilayers — •Venkata Krishna Bharadwaj1, Libor Šmejkal1,2, and Jairo Sinova1 — 1Institut für Physik, Johannes Gutenberg Universität Mainz, Germany — 2Max Planck Institute for the Physics of Complex Systems, Dresden, Germany
A recent development in the field of magnetism has introduced a new category of magnetic materials known as altermagnets [1]. These materials form a distinct class of magnetic compounds, characterized by magnetic compensation and the breaking of time-reversal symmetry, leading to a spin-split band structure. This unique band structure exhibits alternating spin polarization in both real and reciprocal spaces. The spin splitting originates from variations in local crystal field anisotropies across different magnetic sublattices. In this study, we introduce a novel approach to achieve altermagnetism in two-dimensional van der Waals materials by twisting bilayers. Furthermore, we explore the physical properties of altermagnets arising in these twisted bilayer structures. Our results lay the groundwork for exploring new possibilities in altermagnetic materials.
[1] L. Šmejkal, et al., Phys. Rev. X 12, 031042 (2022).
Keywords: Altermagnets; magnetic bilayers; twistronics