Superconducting Spintronics

Superconducting Spintronics

2 Oct 2015 | Jacob Linder and Jason W. A. Robinson
Superconducting spintronics combines superconductivity and spintronics to enhance device functionality and performance. Spin-triplet Cooper pairs, formed at superconductor-ferromagnet interfaces, enable new superconducting states that minimize Joule heating and dissipation. Spintronics offers faster and more energy-efficient circuits using spin currents, with applications in hard disk drives via giant magnetoresistance. Recent advances show that superconducting order can enhance spin injection and magnetoresistance. Spin-triplet supercurrents can carry net spin components, potentially eliminating heating in spintronic devices. Experimental and theoretical progress has enabled the generation and manipulation of triplet pairs in superconducting-ferromagnetic structures. Spin-triplet pairing allows long-range spin currents in ferromagnetic materials, with applications in spin-valves and magnetoresistance. Spin-polarized quasiparticles in superconductors have long spin lifetimes, enhancing spin transport. Superconducting spintronics also enables spin-charge separation, where quasiparticles carry spin but not charge near the superconducting gap edge. Theoretical models show that spin-triplet supercurrents can induce spin-transfer torque and magnetization dynamics, with potential applications in magnetic domain wall motion. Phase-battery junctions and thermoelectric effects in superconducting spintronics offer new ways to control superconductivity and spin transport. Future research aims to develop non-equilibrium transport frameworks, clarify the relationship between supercurrents and magnetization configurations, and explore the role of spin-orbit coupling and magnetic vector potentials in superconducting proximity effects. Advances in experimental fabrication and interface control are expected to lead to new discoveries in the synergy between superconductivity and spintronics.Superconducting spintronics combines superconductivity and spintronics to enhance device functionality and performance. Spin-triplet Cooper pairs, formed at superconductor-ferromagnet interfaces, enable new superconducting states that minimize Joule heating and dissipation. Spintronics offers faster and more energy-efficient circuits using spin currents, with applications in hard disk drives via giant magnetoresistance. Recent advances show that superconducting order can enhance spin injection and magnetoresistance. Spin-triplet supercurrents can carry net spin components, potentially eliminating heating in spintronic devices. Experimental and theoretical progress has enabled the generation and manipulation of triplet pairs in superconducting-ferromagnetic structures. Spin-triplet pairing allows long-range spin currents in ferromagnetic materials, with applications in spin-valves and magnetoresistance. Spin-polarized quasiparticles in superconductors have long spin lifetimes, enhancing spin transport. Superconducting spintronics also enables spin-charge separation, where quasiparticles carry spin but not charge near the superconducting gap edge. Theoretical models show that spin-triplet supercurrents can induce spin-transfer torque and magnetization dynamics, with potential applications in magnetic domain wall motion. Phase-battery junctions and thermoelectric effects in superconducting spintronics offer new ways to control superconductivity and spin transport. Future research aims to develop non-equilibrium transport frameworks, clarify the relationship between supercurrents and magnetization configurations, and explore the role of spin-orbit coupling and magnetic vector potentials in superconducting proximity effects. Advances in experimental fabrication and interface control are expected to lead to new discoveries in the synergy between superconductivity and spintronics.
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