Giant magnetoanisotropy in the Josephson effect and switching of staggered order in antiferromagnets

Abstract

We predict that the amplitude of the Josephson current through an antiferromagnetic weak link changes by several orders of magnitude upon rotation of the Néel order parameter characterizing the staggered magnetic order. This occurs due the presence of spin-orbit coupling arising from structural inversion asymmetry which makes the band gap in the antiferromagnet highly sensitive to the staggered order parameter direction. We also demonstrate that when phase-biasing the junction, magnetization dynamics is induced which switches the direction of the Néel vector in the antiferromagnet. These results reveal an interesting versatility of antiferromagnetic Josephson junctions as they offer both a large tunability of the supercurrent magnitude via the staggerered magnetization and phase-coherent control over the Néel order parameter.

6 pages, 7 figures. To appear in Phys. Rev. B

References in corpus (5)

• Magnetic moment manipulation by a Josephson current
• Long-range spin-polarized quasiparticle transport in mesoscopic Al superconductors with a Zeeman splitting
• Electrical and Thermal Transport in Antiferromagnet-Superconductor Junctions
• Magnetic control of superconducting heterostructures using compensated antiferromagnets
• Thermally induced spin torque and domain wall motion in superconductor/antiferromagnetic insulator bilayers

Cited by in corpus (5)

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• Magnetic anisotropy of superconducting transition in S/AF heterostructures with spin-orbit coupling
• Neel proximity effect in superconductor/antiferromagnet heterostructures