Long-Distance Spin Transport Through a Graphene Quantum Hall Antiferromagnet

Abstract

Antiferromagnetic insulators (AFMI) are robust against stray fields, and their intrinsic dynamics could enable ultrafast magneto-optics and ultrascaled magnetic information processing. Low dissipation, long distance spin transport and electrical manipulation of antiferromagnetic order are much sought-after goals of spintronics research. Here, we report the first experimental evidence of robust long-distance spin transport through an AFMI, in our case the gate-controlled, canted antiferromagnetic (CAF) state that appears at the charge neutrality point of graphene in the presence of an external magnetic field. Utilizing gate-controlled quantum Hall (QH) edge states as spin-dependent injectors and detectors, we observe large, non-local electrical signals across a 5 micron-long, insulating channel only when it is biased into the nu=0 CAF state. Among possible transport mechanisms, spin superfluidity in an antiferromagnetic state gives the most consistent interpretation of the non-local signal's dependence on magnetic field, temperature and filling factors. This work also demonstrates that graphene in the QH regime is a powerful model system for fundamental studies of antiferromagnetic, and in the case of a large in-plane field, ferromagnetic spintronics.

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• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
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• Origins of Nonlocality near the Dirac Point in Graphene
• Spin Superfluidity in the $\nu =0$ Quantum Hall State of Graphene
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Cited by in corpus (64)

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• Imaging tunable quantum Hall broken-symmetry orders in graphene
• STM Study of Quantum Hall Isospin Ferromagnetic States of Zero Landau Level in Graphene Monolayer
• Skyrmion solids in monolayer graphene
• Long-range nontopological edge currents in charge-neutral graphene
• Electrically Switchable van der Waals Magnon Valves
• The dynamics of bimeron skyrmions in easy-plane magnets induced by a spin supercurrent
• Spin hydrodynamics in amorphous magnets
• A Cleanroom in a Glovebox
• Strong-Magnetic-Field Magnon Transport in Monolayer Graphene
• Gapless Spin Wave Transport through a Quantum Canted-Antiferromagnet
• Superfluid spin transport in ferro- and antiferromagnets
• Correlations in the elastic Landau level of spontaneously buckled graphene
• Quantum Hydrodynamics of Vorticity
• SU(4) spin waves in the $\nu =\pm 1$ quantum Hall ferromagnet in graphene
• Cooper-Pair Spin Current in a Strontium Ruthenate Heterostructure
• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Thermodynamics of free and bound magnons in graphene
• Quantum hydrodynamics of spin winding
• Theory of Competing Charge Density Wave, Kekule and Antiferromagnetic ordered Fractional Quantum Hall states in Graphene aligned with Boron Nitride
• Transport signature of the magnetic Berezinskii-Kosterlitz-Thouless transition
• Scattering of magnons at graphene quantum-Hall-magnet junctions
• A new class of nonreciprocal spin waves on the edges of 2D antiferromagnetic honeycomb nanoribbons
• Critical Energy Dissipation in a Binary Superfluid Gas by a Moving Magnetic Obstacle
• Hydrodynamic description of long-distance spin transport through noncollinear magnetization states: the role of dispersion, nonlinearity, and damping
• Non-Abelian braiding in spin superconductors utilizing the Aharonov-Casher effect
• Perspectives on spin hydrodynamics in ferromagnetic materials
• Spin superfluidity in noncollinear antiferromagnets
• Self-stabilizing exchange-mediated spin transport
• Easy-plane spin Hall oscillator
• Superfluid spin transport in magnetically ordered solids
• Theory of broken symmetry quantum Hall states in the $N=1$ Landau level of Graphene
• Absence of heat flow in ν = 0 quantum Hall ferromagnet in bilayer graphene
• Spin-valley entangled quantum Hall states in graphene
• Transition between canted antiferromagnetic and spin-polarized ferromagnetic quantum Hall states in graphene on a ferrimagnetic insulator
• Emergent inhomogeneity and non-locality in a graphene field-effect transistor on a near-parallel moire superlattice of transition metal dichalcogenides
• Crossover from Diffusive to Superfluid Transport in Frustrated Magnets
• Phase diagram of the $\nu =2$ quantum Hall state in bilayer graphene
• Vanishing bulk heat flow in the nu=0 quantum Hall ferromagnet in monolayer graphene
• Asymmetric dynamics of edge exchange spin waves in honeycomb nanoribbons with zigzag and bearded edges boundaries
• Helical Edge States and Quantum Phase Transitions in Tetralayer Graphene
• Dynamically stabilized spin superfluidity in frustrated magnets
• Magnonic Band Structure Established by Chiral Spin-Density Waves in Thin Film Ferromagnets
• Spin-injection-generated shock waves and solitons in a ferromagnetic thin film: the spin piston problem
• Electrical noise spectroscopy of magnons in a quantum Hall ferromagnet
• Controllable vortex shedding from dissipative exchange flows in ferromagnetic channels
• SU(4) Symmetry Breaking and Induced Superconductivity in Graphene Quantum Hall Edges
• Magnetic and Lattice Ordered Fractional Quantum Hall Phases in Graphene
• Fractional quantum Hall coexistence phases in higher Landau levels of graphene
• Superfluid Spin Transistor
• Tuning Spin Transport in a Graphene Antiferromagnetic Insulator
• Spin-Injection-Generated Shock Waves and Solitons in a Ferromagnetic Thin Film
• Contact solitons as spin pistons in one-dimensional ferromagnetic channels
• Evidence of magnetoelectronic electromagnon mediated transport in flexoelectronic heterostructures
• Quantum Monte Carlo at the Graphene Quantum Hall Edge
• Dynamics of metastable contact soliton dissipative exchange flows in one-dimensional ferromagnetic channels
• Spin Hall effect of vorticity
• Nonreciprocal superfluidlike topological spin transport
• Temperature-induced phase transitions in the quantum Hall magnet of bilayer graphene
• Magnon transmission across $\nu =1|-1|1$ mono-layer graphene junction as a probe of electronic structure
• Geometric phase driven Josephson junction: Possible experimental scheme for the search of spin superfluidity
• Uniquely identifying quantum Hall phases in charge neutral graphene
• Interlayer charge transfer from contact electrification in conducting micro and nanoscale thin film heterostructures
• Magnon scattering and transduction in Coulomb-coupled quantum Hall ferromagnets