Aleksei V. Kimel
Light-spin interactions in altermagnets are very interesting and offer intriguing opportunities for unprecedentedly fast magnetic data storage. In my talk I will start with introduction of symmetry analysis of light-spin interaction in antiferromagnetic materials with a special attention to the materials with the point group hosting altermagnetism. It will be shown, for instance, that in these materials the magnetic circular birefringence scales linearly with the antiferromagnetic Neel vector. Using similar formalism, it will be also shown how light can control spin in antiferromagnetic materials. I will also review experimental works supporting the conclusions of the symmetry analysis. In my talk, I will also discuss magneto-optical effects, which are driven by the exchange interaction and show that these effects are not necessarily observed in altermagnets.