Neutron scattering under ~0.6% tensile strain reveals C2 symmetry in spin excitations of FePSe3 that persists above TN, indicating three-state Potts nematicity from vestigial zigzag AFM order.
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Signatures of three-state Potts nematicity in spin excitations of the van der Waals antiferromagnet FePSe$_3$
Neutron scattering under ~0.6% tensile strain reveals C2 symmetry in spin excitations of FePSe3 that persists above TN, indicating three-state Potts nematicity from vestigial zigzag AFM order.