Theory of Josephson transport through spintronics nano-structure

Abstract

We study the Josephson transport through ferromagnetic insulators (FIs) by taking into account its band structure explicitly. In the case of the fully polarized FIs (FPFIs), we found the formation of a pi-junction and an atomic-scale 0-pi transition induced by increasing the FI thickness. More remarkably, in the Josephson junction through spin-filter materials such as Eu chalcogenides, the orbital hybridization between the conduction d and the localized f electron gives rise to the pi-junction behavior. Such FI-based pi-junctions can be used to implement highly-coherent solid-state quantum bits.

5 pages, 3 figures

References in corpus (9)

• Spintronics: Fundamentals and applications
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• Insulating Ferromagnetism in La${}_4$Ba${}_2$Cu${}_2$O${}_{10}$: an \textit{Ab Initio} Wannier Function Analysis
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• Nonequilibrium Superconductivity near Spin Active Interfaces
• Macroscopic quantum dynamics of pi-junctions with ferromagnetic insulators
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Cited by in corpus (6)

• Spectrum of Andreev bound states in Josepshon junctions with a ferromagnetic insulator
• Heat transport and electron cooling in ballistic normal-metal/spin-filter/superconductor junctions
• Atomic scale 0-pi transition in a high-Tc superconductor/ferromagnetic-insulator/high-T superconductor Josephson junction
• Thermally induced 0-pi phase transition in Josephson junctions through a ferromagnetic oxide film
• Signatures of Long-Range Spin-Triplet Component in Andreev Interferometer
• Tunneling Hamiltonian description of the atomic-scale 0-pi transition in superconductor/ferromagnetic-insulator junctions