Altermagnets: Multiferroicity, Excitons, Proximity, Topology

Anisotropic and tunable spin splitting in altermagnets provides important opportunities to explore their fundamental properties and consider applications where, in more conventional systems, it is possible to integrate spintronics, electronics, and photonics. For example, anisotropic spin dynamics in altermagnets could improve quantum sensing, while multiferroic altermagnets offer electrical control of magnetism and switching on and off spin currents that does not require magnetization reversal. By using spin space group and Bethe-Salpeter equation we classify excitons in altermagnets. The strain-tunability of altermagnets is also reflected in the tunability of excitons. With the growing interest to design materials and emergent phenomena through proximity effects we explore the implications of the altermagnetic proximity effects in the normal and the superconducting state, including tunable topological properties.

Séminaire organisé dans le cadre du programme interdisciplinaire MAT-PULSE.