Enhancement of Josephson supercurrent in a π-junction state by chiral antiferromagnetism

摘要

Abstract available in English only.

We show that chiral antiferromagnetism with nonrelativistic spin-split bands can enhance, rather than suppress, Josephson supercurrents. The mechanism combines dominant equal-spin triplet pairing with strong momentum-space fluctuations of singlet pairing. In Josephson junctions formed from chiral antiferromagnetic metals and conventional superconductors, the enhanced current is stabilized in a π-junction state and remains robust over a broad range of energies, temperatures, and junction lengths.