Fig. 1: Crystal structure.
From: Altermagnetism from coincident Van Hove singularities: application to κ-Cl

a Hopping parameters. b Altermagnet where arrows represent spins. c Orbital altermagnet where arrows represent currents (even-parity current loop order). We name this state an orbital altermagnet since the local moments induced by the current loops form an altermagnet (which has the same symmetries as the altermagnet depicted in (b)).