Superconducting proximity effect and long-ranged triplets in dirty metallic antiferromagnets

Abstract

Antiferromagnets have no net spin-splitting on the scale of the superconducting coherence length. Despite this, antiferromagnets have been observed to suppress superconductivity in a similar way as ferromagnets, a phenomenon that still lacks a clear understanding. We find that this effect can be explained by the role of impurities in antiferromagnets. Using quasiclassical Green's functions, we study the proximity effect and critical temperature in diffusive superconductor-metallic antiferromagnet bilayers. The non-magnetic impurities acquire an effective magnetic component in the antiferromagnet. This not only reduces the critical temperature but also separates the superconducting correlations into short-ranged and long-ranged components, similar to ferromagnetic proximity systems.

5 pages, 4 figures

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Cited by in corpus (17)

• Superconducting phenomena in systems with unconventional magnets
• Superconductor-altermagnet memory functionality without stray fields
• Quasiclassical theory of superconducting spin-splitter effects and spin-filtering via altermagnets
• Proximity effect in superconductor/antiferromagnet hybrids: Neel triplets and impurity suppression of superconductivity
• Generation of spin-triplet Cooper pairs via a canted antiferromagnet
• Interface probe for antiferromagnets using geometric curvature
• Oscillatory superconducting transition temperature in superconductor/antiferromagnet heterostructures
• Topological superconductivity in a magnetic-texture coupled Josephson junction
• Superconducting spin valves based on antiferromagnet/superconductor/antiferromagnet heterostructures
• Neel proximity effect in superconductor/antiferromagnet heterostructures
• Finite-momentum mixed singlet-triplet pairing in chiral antiferromagnets induced by even-parity spin texture
• Enhancement of Josephson Supercurrent in a $\pi$-Junction state by Chiral Antiferromagnetism
• Andreev bound states at nonmagnetic impurities in superconductor/antiferromagnet heterostructures
• Triplet correlations in superconductor/antiferromagnet heterostructures: dependence on type of antiferromagnetic ordering
• Odd-frequency Pairing in Josephson Junctions Coupled by Magnetic Textures
• Spin-Valley Locking and Pure Spin-Triplet Superconductivity in Noncollinear Antiferromagnets Proximitized to Conventional Superconductors
• Influence of Magnetic Order on Proximity-Induced Superconductivity in Mn Layers on Nb(110) from First Principles