Antiferromagnets with multiple magnetic sublattices host non-Abelian SU(N) gauge fields in magnon bands that prevent Berry curvature cancellation and enable a robust magnon thermal Hall response.
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Dirac quadrupole altermagnets in 2D exhibit a topological orbital piezomagnetic effect from strain altering their quadrupole Dirac points.
Projective symmetry in hexagonal lattices with rational magnetic flux enforces novel non-zero-energy Dirac touchings at pi flux, constrains zero-energy Dirac points for general fluxes, and imposes distinct Chern number rules on gapped bands and multiplets.
Direct ARPES evidence of robust topological surface states from Dirac nodal lines in Eu(Ga,Al)4 magnets, coupled to helical antiferromagnetic order, confirms dual real-space and momentum-space topology.
In this non-degenerate mixture at charge neutrality, conductivity is temperature-independent at low T from Dirac carriers but acquires a negative correction from scattering with thermally excited massive holes that strengthens with temperature and is stronger for short-range interactions.
citing papers explorer
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Classification of magnon thermal Hall systems based on U(1) to non-Abelian gauge fields
Antiferromagnets with multiple magnetic sublattices host non-Abelian SU(N) gauge fields in magnon bands that prevent Berry curvature cancellation and enable a robust magnon thermal Hall response.
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Topological piezomagnetic effect in two-dimensional Dirac quadrupole altermagnets
Dirac quadrupole altermagnets in 2D exhibit a topological orbital piezomagnetic effect from strain altering their quadrupole Dirac points.
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Topological constraints on the electronic band structure of hexagonal lattice in a magnetic field
Projective symmetry in hexagonal lattices with rational magnetic flux enforces novel non-zero-energy Dirac touchings at pi flux, constrains zero-energy Dirac points for general fluxes, and imposes distinct Chern number rules on gapped bands and multiplets.
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Robust topological surface states in skyrmion-host magnets Eu(Ga,Al)4: evidence for dual topology
Direct ARPES evidence of robust topological surface states from Dirac nodal lines in Eu(Ga,Al)4 magnets, coupled to helical antiferromagnetic order, confirms dual real-space and momentum-space topology.
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Interaction-driven transport in a non-degenerate mixture of Dirac and massive fermions at charge neutrality point
In this non-degenerate mixture at charge neutrality, conductivity is temperature-independent at low T from Dirac carriers but acquires a negative correction from scattering with thermally excited massive holes that strengthens with temperature and is stronger for short-range interactions.