Generation of spin-triplet Cooper pairs via a canted antiferromagnet

Abstract

Spinful triplet Cooper pairs can be generated from their singlet counterparts available in a conventional superconductor (S) using two or more noncollinear magnetic moments, typically contributed by different magnets in a multilayered heterostructure. Here, we theoretically demonstrate that an S interfaced with a canted antiferromagnet (AF) harbors spinful triplet Cooper pairs capitalizing on the intrinsic noncollinearity between the two AF sublattice magnetizations. As the AF canting can be controlled by an applied field, our work proposes a simple bilayer structure that admits controllable generation of spin-triplet Cooper pairs. Employing the Bogoliubov-de Gennes framework, we delineate the spatial dependence of the spin-triplet correlations. We further evaluate the superconducting critical temperature as a function of the AF canting, which provides one experimental observable associated with the emergence of these triplet correlations.

24 pages (excluding references), 10 figures

References in corpus (20)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Spin pumping and spin-transfer torques in antiferromagnets
• Evidence for Triplet Superconductivity in a Superconductor-Ferromagnet Spin Valve
• Superfluid spin transport through antiferromagnetic insulators
• Symmetries of Pairing Correlations in Superconductor-Ferromagnet Nanostructures
• Effect of an inhomogeneous exchange field on the proximity effect in disordered superconductor-ferromagnet hybrid structures
• Spin pumping and shot noise in ferrimagnets: bridging ferro- and antiferromagnets
• Boosting spintronics with superconductivity
• Mode-Dependent Damping in Metallic Antiferromagnets Due to Inter-Sublattice Spin Pumping
• Néel proximity effect at antiferromagnet/superconductor interfaces
• Superconductivity-induced change in magnetic anisotropy in epitaxial ferromagnet-superconductor hybrids with spin-orbit interaction
• Magnetization reorientation due to the superconducting transition in heavy-metal heterostructures
• Superconducting proximity effect and long-ranged triplets in dirty metallic antiferromagnets
• Penetration depth of Cooper pairs in the IrMn antiferromagnet
• Quasiparticle density of states and triplet correlations in superconductor/ferromagnetic-insulator structures across a sharp domain wall
• Signatures of superconducting triplet pairing in Ni--Ga-bilayer junctions
• Generation of polarized spin-triplet Cooper pairings by magnetic barriers in superconducting junctions
• Modulation of superconductivity by spin canting in a hybrid antiferromagnet/superconductor oxide
• Controllable enhancement of $p$-wave superconductivity via magnetic coupling to a conventional superconductor

Cited by in corpus (10)

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• Complete $T_c$ suppression and Néel triplets-mediated exchange in antiferromagnet-superconductor-antiferromagnet trilayers
• Thermodynamic properties of a superconductor interfaced with an altermagnet
• Topological superconductivity in a magnetic-texture coupled Josephson junction
• Oscillatory superconducting transition temperature in superconductor/antiferromagnet heterostructures
• Superconducting spin valves based on antiferromagnet/superconductor/antiferromagnet heterostructures
• Neel proximity effect in superconductor/antiferromagnet heterostructures
• Triplet correlations in superconductor/antiferromagnet heterostructures: dependence on type of antiferromagnetic ordering
• Influence of Magnetic Order on Proximity-Induced Superconductivity in Mn Layers on Nb(110) from First Principles
• Odd-frequency Pairing in Josephson Junctions Coupled by Magnetic Textures