Spin-dependent transport in a driven noncolinear antiferromagnetic fractal network

Abstract

Noncolinear magnetic texture breaks the spin-sublattice symmetry which gives rise to a spin-splitting effect. Inspired by this, we study the spin-dependent transport properties in a noncolinear antiferromagnetic fractal structure, namely, the Sierpinski Gasket (SPG) triangle. We find that though the spin-up and spin-down currents are different, the degree of spin polarization is too weak. Finally, we come up with a proposal, where the degree of spin polarization can be enhanced significantly in the presence of a time-periodic driving field. Such a prescription of getting spin-filtering effect from an unpolarized source in a fractal network is completely new to the best of our knowledge. Starting from a higher generation of SPG to smaller ones, the precise dependencies of driving field parameters, spin-dependent scattering strength, interface sensitivity on spin polarization are critically investigated. The spatial distribution of spin-resolved bond current density is also explored. Interestingly, our proposed setup exhibits finite spin polarization for different spin-quantization axes. Arbitrarily polarized light is considered and its effect is incorporated through Floquet-Bloch ansatz. All the spin-resolved transport quantities are computed using Green's function formalism following the Landauer-Büttiker prescription. The present work brings forth new insights into spintronic properties of noncolinear antiferromagnetic SPG and should entice the AFM spintronic community to explore other fractal structures with the possibility of unconventional features.

arXiv comment12 pages, 10 figures

References in corpus (38)

• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Electrical switching of an antiferromagnet
• Observation of Floquet-Bloch states on the surface of a topological insulator
• Large anomalous Hall effect driven by non-vanishing Berry curvature in non-collinear antiferromagnetic Mn3Ge
• Anomalous Hall effect arising from noncollinear antiferromagnetism
• Large anomalous Nernst effect at room temperature in a chiral antiferromagnet
• Spin Anisotropy and Quantum Hall Effect in the Kagome Lattice - Chiral Spin State based on a Ferromagnet-
• Floquet-Bloch theory and topology in periodically driven lattices
• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Strong, anisotropic anomalous Hall effect and spin Hall effect in chiral antiferromagnetic compounds Mn${}_{3}X$ ($X$ = Ge, Sn, Ga, Ir, Rh and Pt)
• Spin-polarized current in non-collinear antiferromagnets
• Subterahertz spin pumping from an insulating antiferromagnet
• Staggering antiferromagnetic domain wall velocity in a staggered spin-orbit field
• Design and characterization of electronic fractals
• Merging of Dirac points and Floquet topological transitions in AC driven graphene
• Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures
• Spin-orbit torques in locally and globally non-centrosymmetric crystals: Antiferromagnets and ferromagnets
• Imaging mesoscopic spin Hall flow: Spatial distribution of local spin currents and spin densities in and out of multiterminal spin-orbit coupled semiconductor nanostructures
• AI Poincaré: Machine Learning Conservation Laws from Trajectories
• Spin Hall effect emerging from a chiral magnetic lattice without spin-orbit coupling
• Transport and optical properties of an electron gas in a Sierpinski carpet
• First-principles study of the structural stability of Mn3Z (Z=Ga, Sn and Ge) Heusler compounds
• Electrical Detection of Spin Backflow from an Antiferromagnetic Insulator/Y3Fe5O12 Interface
• Hall conductivity of Sierpinski carpet
• Robust Picosecond writing of a Layered Antiferromagnet by Staggered Spin-Orbit-Fields
• Tuning interactions between spins in a superconductor
• Spin Transfer Torque in Antiferromagnetic Spin-Valves: From Clean to Disordered Regimes
• Externally controlled high degree of spin polarization and spin inversion in a conducting junction: Two new approaches
• Optical conductivity of a quantum electron gas in a Sierpinski carpet
• Spin-Seebeck effect on the surface of topological insulator due to nonequilibrium spin-polarization parallel to the direction of thermally driven electronic transport
• Magnetic Response of Interacting Electrons in a Fractal Network: A Mean Field Approach
• Spin-selective transmission through a single-stranded magnetic helix
• Periodic, quasi-periodic, fractal, Kolakoski and random binary polymers: Energy structure and carrier transport
• Charge, Spin and Valley Hall Effects in Disordered Graphene
• Dimensional crossover and hidden incommensurability in Josephson junction arrays of periodically repeated Sierpinski gaskets
• Schwinger Boson mean field theory of kagome Heisenberg antiferromagnet with Dzyaloshinskii-Moriya interaction
• Regular magnetic orders in triangular and kagome lattices