Macroscopic altermagnetic domains in MnTe were visualized as two distinct time-reversal symmetry breaking regions with large Kerr rotations independent of net magnetization, controllable by external stimuli.
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Phonon Hall viscosity distinguishes altermagnets through strain-space Berry curvature monopoles and shows sensitivity to electronic features like gapped Dirac points.
Monolayer V2O in a buckled Lieb structure is proposed as a room-temperature 2D altermagnet with 1.2 eV momentum-dependent spin splitting, out-of-plane anisotropy, and ~40 (ħ/e) S cm^{-1} spin Hall conductivity.
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.
Altermagnets exhibit a resonant third-order intrinsic anomalous Hall effect from the Berry curvature quadrupole, serving as a quantum geometric transport fingerprint.
Coulomb interactions drive altermagnetism in the Kagome Hubbard model at Dirac filling, producing an insulating state with split magnons detectable by inelastic neutron scattering.
Altermagnetic sublattice order imposes momentum-dependent nodes in the superconducting gap for local pairing interactions and favors nonunitary equal-spin triplet superconductivity at large spin splitting.
Length and velocity gauges are shown to be equivalent for the adiabatic dc quantum geometric nonlinear conductivity, with Fermi sea terms canceling to leave a Fermi-surface contribution from the band-normalized quantum metric.
Altermagnets provide all-electrical, dephasing-protected spin qubits in quantum dots with tunable frequencies via dot ellipticity and support for fSim gates plus singlet-triplet operation.
Symmetry reduction at surfaces of bulk altermagnets produces spin-degenerate bands when aligned with symmetry planes and modified spin splitting otherwise, including a g-to-d wave conversion in particular thin-film orientations.
In a 2D model Hamiltonian, orbital Hall conductivity quantizes when altermagnetism exceeds sp-hybridization while spin Hall quantizes when Rashba SOC is weaker, with both independent of the other coupling and arising from Fermi-surface Berry curvature.
Symmetry-guided graph neural networks trained on 200 structures screen 100,000+ iTMD configurations to identify 55 antiferromagnetic spintronics candidates with d-wave altermagnetism or giant T-odd spin Edelstein effects.
Finite-momentum superconducting states occur when odd-frequency Cooper pairing correlations in the uniform state reach large amplitudes, identified via poles of the pair fluctuation propagator in weak-coupling theory.
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Altermagnetism in an interacting model of Kagome materials
Coulomb interactions drive altermagnetism in the Kagome Hubbard model at Dirac filling, producing an insulating state with split magnons detectable by inelastic neutron scattering.