Crystalline antiunitary symmetry in altermagnets selects pairing that produces robust nodal topological superconducting phases with Majorana flat bands and chiral edge states.
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An inhomogeneous altermagnetic interlayer in a Josephson junction produces enhanced critical current and spin-polarized supercurrent at π misorientation of Néel vectors through cancellation of pair-breaking oscillations.
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.
A mixed singlet-triplet Ising state in a 2D p-wave magnet transitions to a nodal topological superconducting phase with Majorana edge modes protected by momentum-resolved winding numbers when triplet pairing exceeds singlet pairing.
Gating a finite normal region between a superconducting altermagnet and a metallic reservoir produces perfect nonreciprocal spin and charge currents with tunable polarity via gate voltage and region length.
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Topological Ising superconductivity in two-dimensional p-wave magnet
A mixed singlet-triplet Ising state in a 2D p-wave magnet transitions to a nodal topological superconducting phase with Majorana edge modes protected by momentum-resolved winding numbers when triplet pairing exceeds singlet pairing.