Half-Metallic Superconducting Triplet Spin MultiValves

Abstract

We study spin switching effects in finite-size superconducting multivalve structures. We examine ${\mathrm{F}}_1{\mathrm{F}}_2\mathrm{S}{\mathrm{F}}_3$ and ${\mathrm{F}}_1{\mathrm{F}}_2\mathrm{S}{\mathrm{F}}_3{\mathrm{F}}_4$ hybrids where a singlet superconductor ($\mathrm{S}$) layer is sandwiched among ferromagnet ($\mathrm{F}$) layers with differing thicknesses and magnetization orientations. Our results reveal a considerable number of experimentally viable spin valve configurations that lead to on-off switching of the superconducting state. For $\mathrm{S}$ widths on the order of the superconducting coherence length ${\xi }_0$, non-collinear magnetization orientations in adjacent $\mathrm{F}$ layers with multiple spin-axes leads to a rich variety of triplet spin-valve effects. Motivated by recent experiments, we focus on samples where magnetizations in the ${\mathrm{F}}_1$ and ${\mathrm{F}}_4$ layers exist in a fully spin-polarized half metallic phase, and calculate the superconducting transition temperature, spatially and energy resolved density of states, and the spin-singlet and spin-triplet superconducting correlations. Our findings demonstrate that superconductivity in these devices can be completely switched on or off over a wide range of magnetization misalignment angles due to the generation of equal-spin and opposite-spin triplet pairings.

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• Supercurrent Diode Effect, Spin Torques, and Robust Zero-Energy Peak in Planar Half-Metallic Trilayers
• Tunable magnetic textures in spin valves: From spintronics to Majorana bound states
• Magnetoelectric effects in Josephson junctions
• Superconducting spin-valve effect in heterostructures with ferromagnetic Heusler alloy layers
• Enhanced spin-triplet pairing in magnetic junctions with s-wave superconductors
• Evolution of Pair Correlation Symmetries and Supercurrent Reversal in Tilted Weyl Semimetals
• Induced Energy Gap in Finite-Sized Superconductor/Ferromagnet Hybrids
• Universal two-time correlations, out-of-time-ordered correlators and Leggett-Garg inequality violation by edge Majorana fermion qubits
• Odd triplet superconductivity induced by the moving condensate
• Competitive 0 and π states in S/F multilayers: multimode approach
• Anomalous supercurrent modulated by interfacial magnetizations in Josephson junctions with ferromagnetic bilayers
• Anomalous current-voltage characteristics of SFIFS Josephson junctions with weak ferromagnetic interlayers
• Crossover between standard and inverse spin-valve effect in atomically thin superconductor/half-metal structures
• Signatures of superconducting triplet pairing in Ni--Ga-bilayer junctions
• Josephson current through a ferromagnetic bilayer: Beyond the quasiclassical approximation
• Supergap and subgap enhanced currents in asymmetric {S_1FS_2} Josephson junctions
• Supercurrent-induced long-range triplet correlations and controllable Josephson effect in superconductor/ferromagnet hybrids with extrinsic SOC
• Magnetic Switching in Weyl Semimetal-Superconductor Heterostructures
• Transport of Spin and Mass at Normal-Superfluid Interfaces in the Unitary Fermi Gas
• Spin transport and Spin Tunnelling Magneto-Resistance (STMR) of F$|$NCSC$|$F spin valve
• Spin-orbit-assisted electron pairing in 1D waveguides
• Stealth Majorana Zero Mode in a Trilayer Heterostructure MnTe/Bi2Te3/Fe(Te,Se)
• Expanding the operational temperature window of a superconducting spin valve
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• Probing the magnetoelectric effect in noncentrosymmetric superconductors by equal-spin Andreev tunneling
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