Microscopic mechanism of the five-layer inner-layer rearrangement

Determine the detailed microscopic mechanism by which the two inner-layer magnetizations rearrange in five-layer CrSBr, including whether the transition is connected to anti-phase domain-wall formation.

Background

In the five-layer sample, the disappearance of the ferromagnetic bulk exciton together with the persistence and energy shift of the intermediate resonance is interpreted as a rearrangement of the two inner-layer magnetizations. The resulting state contains two layers hosting intermediate excitons. Although the optical data constrain the likely magnetic configuration, the physical process producing this rearrangement is unresolved; the authors mention anti-phase domain-wall formation as a possible explanation based on observations in A-type antiferromagnets.