Tuning of anomalous Hall effect by spin reorientation in a novel altermagnetic compound CrSb

Recently, a novel phase of non-relativistic collinear magnetism (unlike ferromagnetism and anti-

ferromagnetism) was discovered, one that is characteristic of zero magnetic moment and alternating

spin-momentum locking of energy bands, aptly named altermagnetism. Consideration of the spin

group symmetry reveals that CrSb belongs to a particular symmetry class adherent to this novel

magnetic phase. In this talk, we will report density functional calculation of the Anomalous Hall

conductivity (AHC) in CrSb, as a function of the collinear spin orientation in this material. We

discuss the contribution to the Hall conductivity from the detailed mapping of the Berry curvature

of the electronic bands. We emphasize that, contrary to common misconception, in such a case

where the net magnetization is determined by spin rotation and not domain population, AHC is

not proportional to the former.