Kitaev interactions in the van der Waals antiferromagnet VBr3
arXiv:2601.05001 · doi:10.1016/j.scib.2026.01.040
Abstract
Van der Waals materials hosting Kitaev interactions are promising platforms for exploring exotic quantum phenomena. Here, we report inelastic neutron scattering investigations of the van der Waals antiferromagnet VBr3, which forms a honeycomb lattice structure at room temperature and exhibits zigzag-type magnetic order below 26.5 K. Our observations reveal distinctive low-energy spin excitations arising from gamma, gamma', and M' points, each featuring a spin gap of around 2.5 meV. The overall spin excitation spectra can be effectively described by a spin Hamiltonian incorporating substantial nearest-neighbor Kitaev and biquadratic interactions, along with Heisenberg interactions. Our findings not only establish VBr3 as a new Kitaev magnet but also suggest that ligand engineering may provide a promising strategy to modulate Kitaev interactions, offering new opportunities for designing Kitaev materials with tailored quantum properties.
arXiv comment30 pages, 14 figures
References in corpus (28)
- Anyons in an exactly solved model and beyond
- Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
- Majorana quantization and half-integer thermal quantum Hall effect in a Kitaev spin liquid
- Relevance of the Heisenberg-Kitaev model for the honeycomb lattice iridates A_2IrO_3
- Neutron tomography of magnetic Majorana fermions in a proximate quantum spin liquid
- Generic spin model for the honeycomb iridates beyond the Kitaev limit
- On the Origin of Zigzag Magnetic Order in Iridium Oxide Na2IrO3
- Low-temperature crystal and magnetic structure of -RuCl3
- Magnetic Skyrmion State in Janus Monolayers of Chromium Trihalides Cr(I,X)3
- Possible Kitaev Quantum Spin Liquid State in 2D Materials with S=3/2
- Topological Magnons in Kitaev Magnets at High Fields
- Microscopic mechanism for higher-spin Kitaev model
- Higher-order exchange interactions in two-dimensional magnets
- Kitaev interactions in the Co honeycomb antiferromagnets NaCoSbO and NaCoTeO
- Topological excitations in the ferromagnetic Kitaev-Heisenberg model
- Giant Biquadratic Exchange in 2D Magnets and its Role in Stabilizing Ferromagnetism of NiCl2 Monolayer
- Anomalous Thermal Hall Effect in an Insulating van der Waals Magnet VI3
- Microscopic origin of magnetism in monolayer transition metal dihalides
- Spin-1 Kitaev-Heisenberg model on a two-dimensional honeycomb lattice
- Geometric integration of classical spin dynamics via a mean-field Schrödinger equation
- Large orbital magnetic moment in VI3
- Langevin dynamics of generalized spins as SU() coherent states
- Ground-state phase diagram of spin- Kitaev-Heisenberg models
- Triple-meron crystal in high-spin Kitaev magnets
- Two-dimensional ferromagnetic spin-orbital excitations in the honeycomb VI
- Signatures of Kitaev interactions in the van der Waals ferromagnet VI3
- Quantum phase transition between spin liquid and spin nematics in spin-1 Kitaev honeycomb model
- Lattice and magnetic structure in the van der Waals antiferromagnet VBr3