In d-wave altermagnets the leading intrinsic anomalous thermal Hall effect appears at third order in temperature gradient and is governed by a nonlinear thermal Berry-connection polarizability that encodes the quantum metric.
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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.
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Intrinsic anomalous thermal hall effect as a signature of quantum metric in d-wave altermagnets
In d-wave altermagnets the leading intrinsic anomalous thermal Hall effect appears at third order in temperature gradient and is governed by a nonlinear thermal Berry-connection polarizability that encodes the quantum metric.
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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.