Synthetic altermagnetism is realized in a continuum platform of antiferromagnetically coupled ferromagnetic films with alternating in-plane exchange anisotropies, reproducing momentum-dependent magnon splitting, nodal directions, and anisotropic contours of A-type altermagnets.
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Magnetization, transport, and muon spin relaxation measurements provide evidence for altermagnetic order in Fe0.85Cr0.15Sb2 below ~3.5 K with time-reversal symmetry breaking but no net magnetization.
Rutile CuF2 exhibits meV-scale chiral magnon splitting arising from resonance-enhanced super-superexchange that amplifies the difference in seventh-neighbor exchanges.
CrSb is a high-temperature metallic altermagnet with coherent magnons of group velocities 61 and 58 km/s that exhibit chiral momentum-space splitting, described by a minimal Heisenberg model with alternating exchange interactions.
Strong correlations suppress spin splitting in MnF2 via band narrowing, enable it in MnTe through Mn 3d-Te 5p hybridization, and produce itinerant splitting without local moments in RuO2.
citing papers explorer
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Synthetic Altermagnetism Beyond the Crystal Limit
Synthetic altermagnetism is realized in a continuum platform of antiferromagnetically coupled ferromagnetic films with alternating in-plane exchange anisotropies, reproducing momentum-dependent magnon splitting, nodal directions, and anisotropic contours of A-type altermagnets.
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Evidence for altermagnetic order in Cr-doped FeSb2
Magnetization, transport, and muon spin relaxation measurements provide evidence for altermagnetic order in Fe0.85Cr0.15Sb2 below ~3.5 K with time-reversal symmetry breaking but no net magnetization.
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Resonance-enhanced super-superexchange yields giant chiral magnon splitting in rutile altermagnets
Rutile CuF2 exhibits meV-scale chiral magnon splitting arising from resonance-enhanced super-superexchange that amplifies the difference in seventh-neighbor exchanges.
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Coherent high-velocity chiral magnons in the metallic altermagnet CrSb
CrSb is a high-temperature metallic altermagnet with coherent magnons of group velocities 61 and 58 km/s that exhibit chiral momentum-space splitting, described by a minimal Heisenberg model with alternating exchange interactions.
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Strong electron correlations and ligand hybridization for altermagnetism
Strong correlations suppress spin splitting in MnF2 via band narrowing, enable it in MnTe through Mn 3d-Te 5p hybridization, and produce itinerant splitting without local moments in RuO2.