Gate-tunable spin waves in antiferromagnetic atomic bilayers

Abstract

The emergence of two-dimensional (2D) layered magnetic materials has opened an exciting playground for both fundamental studies of magnetism in 2D and explorations of spinbased applications. Remarkable properties, including spin filtering in magnetic tunnel junctions and gate control of magnetic states, have recently been demonstrated in 2D magnetic materials. While these studies focus on the static properties, dynamic magnetic properties such as excitation and control of spin waves have remained elusive. Here we excite spin waves and probe their dynamics in antiferromagnetic CrI3 bilayers by employing an ultrafast optical pump/magneto-optical Kerr probe technique. We identify sub-terahertz magnetic resonances under an in-plane magnetic field, from which we determine the anisotropy and interlayer exchange fields and the spin damping rates. We further show tuning of antiferromagnetic resonances by tens of gigahertz through electrostatic gating. Our results shed light on magnetic excitations and spin dynamics in 2D magnetic materials, and demonstrate their unique potential for applications in ultrafast data storage and processing.

References in corpus (25)

• 2D materials and van der Waals heterostructures
• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Antiferromagnetic spintronics
• Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe${}_3$GeTe${}_2$
• Excitons in atomically thin transition metal dichalcogenides
• Magnetic 2D materials and heterostructures
• Electrical Control of 2D Magnetism in Bilayer CrI3
• Giant Tunneling Magnetoresistance in Spin-Filter van der Waals Heterostructures
• Controlling magnetism in 2D CrI3 by electrostatic doping
• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• Probing magnetism in 2D van der Waals crystalline insulators via electron tunneling
• Electric-field switching of two-dimensional van der Waals magnets
• Very Large Tunneling Magnetoresistance in Layered Magnetic Semiconductor CrI${}_3$
• Pressure-controlled interlayer magnetism in atomically thin CrI3
• One million percent tunnel magnetoresistance in a magnetic van der Waals heterostructure
• Fundamental Spin Interactions Underlying the Magnetic Anisotropy in the Kitaev Ferromagnet CrI${}_3$
• Gigahertz frequency antiferromagnetic resonance and strong magnon-magnon coupling in the layered crystal CrCl3
• Raman Spectroscopy, Photocatalytic Degradation and Stabilization of Atomically Thin Chromium Triiodide
• Voltage Control of a van der Waals Spin-Filter Magnetic Tunnel Junction
• Electrical tuning of layer-polarized exciton gases in WSe2 bilayers
• Raman fingerprint of two terahertz spin wave branches in a two-dimensional honeycomb Ising ferromagnet
• Probing the spin-polarized electronic band structure in monolayer transition metal dichalcogenides by optical spectroscopy
• Quasi-Two-Dimensional Magnon Identification in Antiferromagnetic FePS3 via Magneto-Raman Spectroscopy
• Van der Waals Engineering of Ferromagnetic Semiconductor Heterostructures for Spin and Valleytronics

Cited by in corpus (54)

• Quantum magnonics: when magnon spintronics meets quantum information science
• Exciton-Coupled Coherent Magnons in a 2D Semiconductor
• Direct observation of 2D magnons in atomically thin CrI${}_3$
• Magnetic Two-Dimensional Chromium Trihalides: A Theoretical Perspective
• Controlling the anisotropy of a van der Waals antiferromagnet with light
• Tunable Exciton-Hybridized Magnon Interactions in a Layered Semiconductor
• Magnetic domains and domain wall pinning in two-dimensional ferromagnets revealed by nanoscale imaging
• Advances in coherent coupling between magnons and acoustic phonons
• Magnetic field effect on topological spin excitations in CrI${}_3$
• Chirality selective magnon-phonon hybridization and magnon-induced chiral phonons in a layered zigzag antiferromagnet
• Evidence of Noncollinear Spin Texture in Magnetic Moiré Superlattices
• Roadmap for Photonics with 2D Materials
• Electron correlation effects on exchange interactions and spin excitations in 2D van der Waals materials
• Opportunities in Electrically Tunable 2D Materials Beyond Graphene: Recent Progress and Future Outlook
• Spin Dynamics in van der Waals Magnetic Systems
• Symmetry breaking induced magnon-magnon coupling in synthetic antiferromagnets
• Strain and electric-field control of spin-spin interactions in monolayer CrI${}_3$
• Electrically Switchable van der Waals Magnon Valves
• Coherent Helicity-Dependent Spin-Phonon Oscillations in the Ferromagnetic van der Waals Crystal CrI3
• Spin dynamics slowdown near the antiferromagnetic critical point in atomically thin FePS3
• Progress and Prospects in Two-Dimensional Magnetism of van der Waals Materials
• Evidence of standing spin-waves in a van der Waals magnetic material
• Observation of the Axion quasiparticle in 2D MnBi${}_2$Te${}_4$
• Self-hybridization and tunable magnon-magnon coupling in van der Waals synthetic magnets
• Unified Treatment of Magnons and Excitons in Monolayer CrI${}_3$ from Many-Body Perturbation Theory
• Probing spin dynamics of ultra-thin van der Waals magnets via photon-magnon coupling
• AC susceptometry of 2D van der Waals magnets enabled by the coherent control of quantum sensors
• Real-time observation of magnetization and magnon dynamics in a two-dimensional topological antiferromagnet MnBi2Te4
• Plasmon-magnon interactions in two-dimensional honeycomb magnets
• Observation of spin-wave moiré edge and cavity modes in twisted magnetic lattices
• Master equation approach to magnon relaxation and dephasing
• Intrinsic staggered spin-orbit torque for the electrical control of antiferromagnets -- application to CrI${}_3$
• Electrical switching of spin-polarized light-emitting diodes based on a 2D CrI3/hBN/WSe2 heterostructure
• Giant spin Nernst effect in a two-dimensional antiferromagnet due to magnetoelastic coupling-induced gaps and interband transitions between magnon-like bands
• Electrically-driven amplification of terahertz acoustic waves in graphene
• Critical phenomena of the layered ferrimagnet Mn3Si2Te6 following proton irradiation
• Effect of biaxial strain and hydrostatic pressure on the magnetic properties of bilayer CrI3
• Universal field dependence of magnetic resonance near zero frequency
• Electron Spin Resonance Spectroscopy on Magnetic Van der Waals Compounds
• Enhancing magneto-optic effects in two-dimensional magnets by thin-film interference
• Anomalous Tunneling Magnetoresistance Oscillation and Electrically Tunable Tunneling Anisotropic Magnetoresistance in Few-layer CrPS4
• Phonon-mediated strong coupling between a three-dimensional topological insulator and a two-dimensional antiferromagnetic material
• Electrical tuning of the magnetic properties of 2D magnets: the case of ${\mathrm{Cr}}_2{\mathrm{Ge}}_2{\mathrm{Te}}_6$
• Magnetically switchable spin wave retarder with $90^{\circ }$ antiferromagnetic domain wall
• Spin-orbit coupling and linear crossings of dipolar magnons in van der Waals antiferromagnets
• Optical Switching of Moiré Chern Ferromagnet
• Mechanical resonant sensing of spin texture dynamics in a two-dimensional antiferromagnet
• Anisotropic Gigahertz Antiferromagnetic Resonances of the Easy-Axis van der Waals Antiferromagnet CrSBr
• Light-induced ultrafast magnetization dynamics in van der Waals antiferromagnetic CrSBr
• Electrically switchable entanglement channel in van der Waals magnets
• Electrostatic Control of Magneto-Optic Excitonic Resonances in the van der Waals Ferromagnetic Semiconductor Cr${}_2$Ge${}_2$Te${}_6$
• Cavity based sensing of antiferromagnetic canting and nonzero-momentum spin waves in a van der Waals cavity-magnon-polariton system
• Optically induced magnetic inertia and magnons from non-Markovian extension of the Landau-Lifshitz-Gilbert equation
• Coherent Spin-Phonon Coupling in the Layered Ferrimagnet Mn3Si2Te6