Surface altermagnetism with d-wave spin splitting occurs in centrosymmetric collinear antiferromagnets only when no sublattice-exchanging antiunitary symmetry survives at the surface, as shown by symmetry analysis and first-principles calculations on V3Al and BaMn2Sb2 versus MnPt.
Khmelevskyi, First-principles modeling of longitudinal spin fluctuations in itinerant electron antiferromagnets: High n´ eel temperature in the V3Al alloy, Phys
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$d$-wave Surface Altermagnetism in Centrosymmetric Collinear Antiferromagnets
Surface altermagnetism with d-wave spin splitting occurs in centrosymmetric collinear antiferromagnets only when no sublattice-exchanging antiunitary symmetry survives at the surface, as shown by symmetry analysis and first-principles calculations on V3Al and BaMn2Sb2 versus MnPt.