Spin waves and magnetic exchange Hamiltonian in CrSBr

Abstract

CrSBr is an air-stable 2D van der Waals semiconducting magnet with great technological promise, but its atomic-scale magnetic interactions -- crucial information for high-frequency switching -- are poorly understood. We present an experimental study to determine the CrSBr magnetic exchange Hamiltonian and bulk magnon spectrum. We confirm the $A$-type antiferromagnetic order using single crystal neutron diffraction. We also measure the magnon dispersions using inelastic neutron scattering and rigorously fit the excitation modes to a spin wave model. The magnon spectrum is well described by an intra-plane ferromagnetic Heisenberg exchange model with seven nearest in-plane exchanges. This fitted exchange Hamiltonian enables theoretical predictions of CrSBr behavior: as one example, we use the fitted Hamiltonian to predict the presence of chiral magnon edge modes with a spin-orbit enhanced CrSBr heterostructure.

8 pages and 7 figures, plus six figures of supplemental information

References in corpus (5)

• Spin-Orbit Proximity Effect in Graphene
• Triaxial magnetic anisotropy in the two-dimensional ferromagnetic semiconductor CrSBr
• Quasi 1D electronic transport in a 2D magnetic semiconductor
• Dynamic Magnetic Crossover at the Origin of the Hidden-Order in van der Waals Antiferromagnet CrSBr
• Spin waves and magnetic exchange Hamiltonian in CrSBr

Cited by in corpus (33)

• Exciton-Coupled Coherent Magnons in a 2D Semiconductor
• Multistep magnetization switching in orthogonally twisted ferromagnetic monolayers
• Probing the spin dimensionality in single-layer CrSBr van der Waals heterostructures by magneto-transport measurements
• Spin waves and magnetic exchange Hamiltonian in CrSBr
• Magnon straintronics in the 2D van der Waals ferromagnet CrSBr from first-principles
• Sensing the local magnetic environment through optically active defects in a layered magnetic semiconductor
• Spin Dynamics in van der Waals Magnetic Systems
• Universal spin wavepacket transport in van der Waals antiferromagnets
• Nanoscale magnetism and magnetic phase transitions in atomically thin CrSBr
• Progress and Prospects in Two-Dimensional Magnetism of van der Waals Materials
• Dielectric tunability of magnetic properties in orthorhombic ferromagnetic monolayer CrSBr
• Magnetic imaging and domain nucleation in CrSBr down to the 2D limit
• Magnon-mediated exciton-exciton interaction in a van der Waals antiferromagnet
• Giant exchange splitting in the electronic structure of A-type 2D antiferromagnet CrSBr
• Magneto-optical sensing of the pressure driven magnetic ground states in bulk CrSBr
• Designing magnetic properties in CrSBr through hydrostatic pressure and ligand substitution
• Charge Density Wave and Ferromagnetism in Intercalated CrSBr
• Quantum Sensing of Broadband Spin Dynamics and Magnon Transport in Antiferromagnets
• Field-induced spin polarization in lightly Cr-substituted layered antiferromagnet NiPS3
• Surface-Dominated Quantum Metric-Induced Nonlinear Transport in the Layered Antiferromagnet CrSBr
• Probing Short-Range Correlations in the van der Waals Magnet CrSBr by Small-Angle Neutron Scattering
• Excitons and trions in CrSBr bilayers
• Magnons from time-dependent density-functional perturbation theory and nonempirical Hubbard functionals
• Spin waves in the bilayer van der Waals magnet CrSBr
• Van der Waals CrSBr alloys with tunable magnetic and optical properties
• Directional Flow of Confined Polaritons in CrSBr
• Magnon sensing of NO, NO${}_2$ and NH${}_3$ gas capture on CrSBr monolayer
• Resonant X-ray spectroscopies on Chromium $3\text{d}$ orbitals in CrSBr
• Observation of anisotropic dispersive dark exciton dynamics in CrSBr
• Boltzmann transport theory of magnon-exciton drag
• Light-induced ultrafast magnetization dynamics in van der Waals antiferromagnetic CrSBr
• Assessing Orbital Optimization in Variational and Diffusion Monte Carlo
• Crystallographic Orientation-Dependent Magnetotransport in the Layered Antiferromagnet -- CrSBr