Tunable Anomalous Andreev Reflection and Triplet Pairings in Spin Orbit Coupled Graphene

Abstract

We theoretically study scattering process and superconducting triplet correlations in a graphene junction comprised of ferromagnet-RSO-superconductor in which RSO stands for a region with Rashba spin orbit interaction. Our results reveal spin-polarized subgap transport through the system due to an anomalous equal-spin Andreev reflection in addition to conventional back scatterings. We calculate equal- and opposite-spin pair correlations near the F-RSO interface and demonstrate direct link of the anomalous Andreev reflection and equal-spin pairings arised due to the proximity effect in the presence of RSO interaction. Moreover, we show that the amplitude of anomalous Andreev reflection, and thus the triplet pairings, are experimentally controllable when incorporating the influences of both tunable strain and Fermi level in the nonsuperconducting region. Our findings can be confirmed by a conductance spectroscopy experiment and provide better insights into the proximity-induced RSO coupling in graphene layers reported in recent experiments.

References in corpus (52)

• The electronic properties of graphene
• Electronic spin transport and spin precession in single graphene layers at room temperature
• Proximity effects in superconductor-ferromagnet heterostructures
• Odd Triplet Superconductivity and Related Phenomena in Superconductor-Ferromagnet Structures
• A tight-binding approach to uniaxial strain in graphene
• Andreev reflection and Klein tunneling in graphene
• Coupling of two superconductors through a ferromagnet : evidence for a pi-junction
• Colloquium: The transport properties of graphene: An introduction
• Specular Andreev reflection in graphene
• Spin-polarized supercurrents for spintronics: a review of current progress
• Proximity-induced ferromagnetism in graphene revealed by anomalous Hall effect
• Spin-Orbit Proximity Effect in Graphene
• Rashba effect in the graphene/Ni(111) system
• Generation of pure bulk valley current in graphene
• Spin-orbit coupling as a source of long-range triplet proximity effect in superconductor-ferromagnet hybrid structures
• Topological surface state under graphene for two-dimensional spintronics in air
• Theory of the spin-galvanic effect and the anomalous phase-shift ${\phi }_0$ in superconductors and Josephson junctions with intrinsic spin-orbit coupling
• Triplet proximity effect in FSF trilayers
• Programmable Extreme Pseudomagnetic Fields in Graphene by a Uniaxial Stretch
• Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures
• Spin-valley filtering in strained graphene structures with artificially induced carrier mass and spin-orbit coupling
• Collective excitations of Dirac electrons in a graphene layer with spin-orbit interaction
• Generalized effective hamiltonian for graphene under non-uniform strain
• Gate-tunable spin-charge conversion and a role of spin-orbit interaction in graphene
• Induced Triplet Pairing in clean s-wave Superconductor/Ferromagnet layered structures
• Andreev-Klein reflection in graphene ferromagnet-superconductor junctions
• Half-Metallic Superconducting Triplet Spin Valve
• Inverse proximity effect at superconductor-ferromagnet interfaces: Evidence for induced triplet pairing in the superconductor
• Remotely induced magnetism in a normal metal using a superconducting spin-valve
• Magnetoanisotropic Andreev Reflection in Ferromagnet/Superconductor Junctions
• Spin-controlled superconductivity and tunable triplet correlations in graphene nanostructures
• Spontaneous Edge Accumulation of Spin Currents in Finite-Size Two-Dimensional Diffusive Spin-Orbit Coupled SFS Heterostructures
• Long-Range Spin-Triplet Correlations and Edge Spin Currents in Diffusive Spin-Orbit Coupled SNS Hybrids with a Single Spin-Active Interface
• Proximity Induced Vortices and Long-Range Triplet Supercurrents in Ferromagnetic Josephson Junctions and Spin Valves
• Evidence for spin-triplet superconducting correlations in metal-oxide heterostructures with non-collinear magnetization
• Valley- and spin-switch effects in molybdenum disulfide superconducting spin valve
• Uniformity of the pseudomagnetic field in strained graphene
• Nematic versus ferromagnetic spin filtering of triplet Cooper pairs in superconducting spintronics
• Superconducting Phase Domains for Memory Applications
• Nonlocal transistor based on pure crossed Andreev reflection in a EuO-graphene/superconductor hybrid structure
• Magnetoelectric Andreev effect due to proximity-induced non-unitary triplet superconductivity in helical metals
• Effects of spin-orbit interaction on superconductor-ferromagnet heterostructures: spontaneous electric and spin surface currents
• Tunable Supercurrent at the Charge Neutrality Point via Strained Graphene Junctions
• Long-range proximity effect for opposite-spin pairs in S/F heterostructures under non-equilibrium quasiparticle distribution
• Strain Controlled Spin and Charge Pumping in Graphene Devices via Spin-orbit Coupled Barriers
• Electric field-induced valley degeneracy lifting in uniaxial strained graphene: evidence from magnetophonon resonance
• Quantum Transport of Dirac fermions in graphene with a spatially varying Rashba spin-orbit coupling
• How to detect a genuine quantum pump effect in graphene?
• Transport and noise properties of a normal metal-superconductor-normal metal junction with mixed singlet and chiral triplet pairings
• Charge and spin Hall effect in spin chiral ferromagnetic graphene
• Characteristic energies, transition temperatures, and switching effects in clean SNS graphene nanostructures
• Supercurrent induced domain wall motion

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• Nonlocal Andreev Entanglements and Triplet Correlations in Graphene with Spin Orbit Coupling
• Gate tunability of highly efficient spin-to-charge conversion by spin Hall effect in graphene proximitized with WSe${}_2$
• Critical supercurrent and ${\varphi }_0$ state for probing a persistent spin helix
• Magnetoanisotropic spin-triplet Andreev reflection in ferromagnet-Ising superconductor junctions
• Enhanced spin-triplet pairing in magnetic junctions with s-wave superconductors
• Spin-polarized Andreev tunneling through the Rashba chain
• Superconducting monolayer deposited on substrate: effects of the spin-orbit coupling induced by proximity effects
• Controllable nonreciprocal optical response and handedness-switching in magnetized spin orbit coupled graphene
• Enhancement of crossed Andreev reflection in a Kitaev ladder connected to normal metal leads
• Unconventional pairing induced anomalous transverse shift in Andreev reflection
• Spin-dependent thermoelectric effects in graphene based superconductor junctions
• Spin Transport and Spin Pump in Graphene-like Materials: Effect of tilt in Dirac cones
• Electronic transport and the related anomalous effects in silicene-like hexagonal lattice
• Andreev reflection in Euler materials
• Pseudo-spin triplet superconductivity in transition-metal dichalcogenide monolayers and Andreev reflection in the lateral heterostructures of 2$H$-NbSe${}_2$
• Andreev reflection in a Y-shaped graphene-superconductor device
• Spin transport and Spin Tunnelling Magneto-Resistance (STMR) of F$|$NCSC$|$F spin valve
• Tunable magnetoresistance in spin-orbit coupled graphene junctions
• Probing the magnetoelectric effect in noncentrosymmetric superconductors by equal-spin Andreev tunneling
• Signatures of enhanced spin-triplet superconductivity induced by interfacial properties
• Stealth Majorana Zero Mode in a Trilayer Heterostructure MnTe/Bi2Te3/Fe(Te,Se)
• Effect of Rashba spin-orbit coupling, magnetization and mixing of gap parameter on tunnelling conductance in F$|$NCSC junction of an F$|$S$|$F spin valve
• Selective equal spin Andreev reflection at vortex core center in magnetic semiconductor-superconductor heterostructure
• Chiral Josephson effect in double layers: the role of particle-hole duality