Inducing odd-frequency triplet superconducting correlations in a normal metal

Abstract

This work discusses theoretically the interplay between the superconducting and ferromagnetic proximity effects, in a diffusive normal metal strip in contact with a superconductor and a non-uniformly magnetized ferromagnetic insulator. The quasiparticle density of states of the normal metal shows clear qualitative signatures of triplet correlations with spin one (TCS1). When one goes away from the superconduting contact, TCS1 focus at zero energy under the form of a peak surrounded by dips, which show a typical spatial scaling behavior. This behavior can coexist with a focusing of singlet correlations and triplet correlations with spin zero at finite but subgap energies. The simultaneous observation of both effects would enable an unambigous characterization of TCS1.

To appear in Physical Review Letters

References in corpus (6)

• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Phase controlled superconducting proximity effect probed by tunneling spectroscopy
• Manifestation of the odd-frequency spin-triplet pairing state in diffusive ferromagnet / superconductor junctions
• Pairing symmetry conversion by spin-active interfaces in superconducting junctions
• Spin-Resolved Tunneling Studies of the Exchange Field in EuS/Al Bilayers
• Spectroscopy and critical temperature of diffusive superconducting/ferromagnetic hybrid structures with spin-active interfaces

Cited by in corpus (24)

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• Vanishing Meissner effect as a hallmark of in-plane FFLO instability in superconductor - ferromagnet layered systems
• Unconventional Superconductivity in Double Quantum Dots
• Meissner Effect Probing of Odd-Frequency Triplet Pairing in Superconducting Spin Valves
• Spin caloritronics with superconductors: Enhanced thermoelectric effects, generalized Onsager response-matrix, and thermal spin currents
• Andreev current enhancement and subgap conductance of superconducting hybrid structures in the presence of a small spin-splitting field
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• Enhanced spin-triplet pairing in magnetic junctions with s-wave superconductors
• Robustness of Spin-Triplet Pairing and Singlet-Triplet Pairing Crossover in Superconductor/Ferromagnet Hybrids
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• Long-range proximity effect for opposite-spin pairs in S/F heterostructures under non-equilibrium quasiparticle distribution
• Signature of the long range triplet proximity effect in the density of states
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• Quasiparticle density of states and triplet correlations in superconductor/ferromagnetic-insulator structures across a sharp domain wall
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• Proximity Induced Non-collinear Magnetic States in Planar Superconductor/Ferromagnet Hybrids
• 0-$\pi$ transition driven by magnetic proximity effect in a Josephson junction
• Spin-Valley Locking and Pure Spin-Triplet Superconductivity in Noncollinear Antiferromagnets Proximitized to Conventional Superconductors
• Perspectives on Magnetic/Superconductor Hybrid Systems: Long-range Electromagnetic Phenomena Induced by Proximity Effect and Interfacial Spin-orbit Coupling