Speaker: Maxim Khodas

Title: Hall effect and piezomagnetism in altermagnets

Abstract: The general exposition of altermagnetism is based on the example of two-dimensional Lieb lattice as the simplest realization of this novel magnetic phase. The anomalous Hall effect arising from altermagnetic order and spin–orbit interaction is discussed based on symmetry considerations and illustrated with several examples. The Berry-curvature singularity at nodal lines gives rise to a linear, non-analytic scaling of the Hall conductivity with spin–orbit coupling. In the second part of the talk, I will cover non-relativistic piezomagnetism.  Finally if time permits I will talk about the odd parity magnets as a realization of  Ising superconductors.