Direct penetration of spin-triplet superconductivity into a ferromagnet in Au/SrRuO3/Sr2RuO4 junctions

Abstract

Efforts have been ongoing to establish superconducting spintronics utilizing ferromagnet/superconductor heterostructures1. Previously reported devices are based on spin-singlet superconductors (SSCs), where the spin degree of freedom is lost. Spin-polarized supercurrent induction in ferromagnetic metals (FMs) is achieved even with SSCs, but only with the aid of interfacial complex magnetic structures, which severely affect information imprinted to the electron spin. Use of spin-triplet superconductors (TSCs) with active spins potentially overcomes this difficulty and further leads to novel functionalities. Here, we report spin-triplet superconductivity induction into a FM SrRuO3 from a leading TSC candidate Sr2RuO4, by fabricating microscopic devices using an epitaxial SrRuO3/Sr2RuO4 hybrid. The differential conductance, exhibiting Andreev-reflection features with multiple energy scales up to around half tesla, indicates the penetration of superconductivity over a considerable distance of 15 nm across the SrRuO3 layer without help of interfacial complex magnetism. This demonstrates the first FM/TSC device exhibiting the spin-triplet proximity effect.

References in corpus (6)

• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
• First-Order Superconducting Transition of Sr2RuO4
• 0-$\pi$ transition in magnetic triplet superconductor Josephson junctions
• Evidence for Crossed Andreev Reflections in bilayers of (100)YBCO and the itinerant ferromagnet SrRuO3
• Ferromagnetic SrRuO3 thin-film deposition on a spin-triplet superconductor Sr2RuO4 with highly conducting interface

Cited by in corpus (36)

• Strong Peak in $T_c$ of Sr${}_2$RuO${}_4$ Under Uniaxial Pressure
• Odd-frequency superconductivity
• High-resolution photoemission on Sr2RuO4 reveals correlation-enhanced effective spin-orbit coupling and dominantly local self-energies
• Spin-Orbit Coupling and Electronic Correlations in Sr2RuO4
• Stabilization and control of Majorana bound states with elongated skyrmions
• Half-Metallic Superconducting Triplet Spin MultiValves
• Little-Parks oscillations with half-quantum fluxoid features in Sr2RuO4 micro rings
• Magnetoelectric Andreev effect due to proximity-induced non-unitary triplet superconductivity in helical metals
• Materials challenges for SrRuO3: from conventional to quantum electronics
• Multi-component order parameter superconductivity of Sr${}_2$RuO${}_4$ revealed by topological junctions
• Spontaneous superconducting diode effect in non-magnetic Nb/Ru/Sr${}_2$RuO${}_4$ topological junctions
• Cooper-Pair Spin Current in a Strontium Ruthenate Heterostructure
• Adiabatic and nonadiabatic spin torques induced by spin-triplet supercurrent
• Spontaneous surface flux pattern in chiral p-wave superconductors - revisited
• Identifying possible pairing states in Sr${}_2$RuO${}_4$ by tunneling spectroscopy
• Observability of surface currents in p-wave superconductors
• Electronic and vibrational signatures of ruthenium vacancies in Sr${}_2$RuO${}_4$ thin films
• Anomalous Nonlocal Conductance as a Fingerprint of Chiral Majorana Edge States
• Theory of tunneling spectroscopy of normal metal/ferromagnet/spin-triplet superconductor junctions
• Spin-valley dependent double Andreev reflections in the proximitized graphene/superconductor junction
• Spin susceptibility for orbital-singlet Cooper pair in the three-dimensional Sr${}_2$RuO${}_4$ superconductor
• Local impedance on a rough surface of a chiral $p$-wave superconductor
• Inverse Proximity Effects at Spin-Triplet Superconductor-Ferromagnet Interface
• Observation of superconducting gap spectra of long-range proximity effect in Au/SrTiO${}_3$/SrRuO${}_3$/Sr${}_2$RuO${}_4$ tunnel junctions
• Identification of Spin-Triplet Superconductivity through a Helical-Chiral Phase Transition in Sr${}_2$RuO${}_4$ Thin-Films
• Berezinskii-Kosterlitz-Thouless transition transport in spin-triplet superconductor
• Fermi surface and kink structures in Sr${}_4$Ru${}_3$O${}_{10}$ revealed by synchrotron-based ARPES
• Triplet superconductivity in coupled odd-gon rings
• A Review of Electronic Transport in Superconducting Sr${}_2$RuO${}_4$ Junctions
• Anomalous Hall effect in semiconductor quantum wells in proximity to chiral p-wave superconductors
• Half-quantum vortices on c-axis domain walls in chiral p-wave superconductors
• Probing the magnetoelectric effect in noncentrosymmetric superconductors by equal-spin Andreev tunneling
• Even odder after twenty-three years: the superconducting order parameter puzzle of Sr2RuO4
• Anomalous anisotropic behaviour of spin-triplet proximity effect in Au/SrRuO${}_3$/Sr${}_2$RuO${}_4$ junctions
• Induced ferromagnetic moment at the interface between epitaxial SrRuO${}_3$ film and Sr${}_2$RuO${}_4$ single crystal
• Magnetization texture imprints produced by flux avalanches in ferromagnet/insulator/superconductor heterostructures