Direct evidence for anisotropic magnetic interaction in $\alpha$-RuCl${}_3$ from polarized inelastic neutron scattering

Abstract

Polarized neutron scattering experiments reveal the anisotropy of magnetic correlations in the candidate Kitaev material $\alpha$-RuCl${}_3$. The anisotropy of the inelastic response at the magnetic Bragg positions is just opposite to the expectation for a simple Heisenberg model. Near the antiferromagnetic $q$ vector, there are no low-energy transversal magnon modes directly documenting the fully anisotropic and bond-directional character of the magnetic interaction in $\alpha$-RuCl${}_3$. However, other findings disagree with a simple or strongly dominant Kitaev component.

arXiv comment7 pages 4 figures

References in corpus (37)

• 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
• Quantum Spin Liquids
• Kitaev-Heisenberg Model on Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides $A_2$IrO${}_3$
• Majorana quantization and half-integer thermal quantum Hall effect in a Kitaev spin liquid
• Proximate Kitaev Quantum Spin Liquid Behaviour in α-RuCl${}_3$
• Kitaev quantum spin liquid - concept and materialization
• $\alpha$-RuCl3: a Spin-Orbit Assisted Mott Insulator on a Honeycomb Lattice
• Neutron tomography of magnetic Majorana fermions in a proximate quantum spin liquid
• Models and Materials for Generalized Kitaev Magnetism
• Linear spin wave theory for single-Q incommensurate magnetic structures
• The monoclinic crystal structure of $\alpha$-RuCl${}_3$ and the zigzag antiferromagnetic ground state
• Low-temperature crystal and magnetic structure of $\alpha$-RuCl3
• Excitations in the field-induced quantum spin liquid state of alpha-RuCl3
• Breakdown of Magnons in a Strongly Spin-Orbital Coupled Magnet
• Spin-wave excitations evidencing the Kitaev interaction in single crystalline $\alpha$-RuCl${}_3$
• Hidden symmetries of the extended Kitaev-Heisenberg model: Implications for honeycomb lattice iridates A2IrO3
• Robustness of the thermal Hall effect close to half-quantization in a field-induced spin liquid state
• Ab initio analysis of the tight-binding parameters and magnetic interactions in Na2IrO3
• Na2IrO3 as a molecular orbital crystal
• Higgs mode and its decay in a two dimensional antiferromagnet
• Ferromagnetic Kitaev interaction and the origin of large magnetic anisotropy in $\alpha$-RuCl${}_3$
• Magnetic anisotropy in the Kitaev model systems Na2IrO3 and RuCl3
• Finite field regime for a quantum spin liquid in $\alpha$-RuCl${}_3$
• Rethinking $\alpha$-RuCl${}_3$
• Dynamical and thermal magnetic properties of the Kitaev spin liquid candidate $\alpha$-RuCl${}_3$
• Beyond Kitaev physics in strong spin-orbit coupled magnets
• Identification of Magnetic Interactions and High-field Quantum Spin Liquid in $\alpha$-RuCl${}_3$
• Local magnetic anisotropy in BaFe${}_2$As${}_2$: a polarized inelastic neutron scattering study
• Highly anisotropic magnon dispersion in Ca2RuO4: evidence for strong spin orbit coupling
• Magnon dispersion and dynamic spin response in three-dimensional spin models for $\alpha$-RuCl${}_3$
• Stacking disorder and thermal transport properties of $\alpha$-RuCl${}_3$
• Magnon dispersion in Ca2RuO4: impact of spin-orbit coupling and oxygen moments
• Stacking faults in $\alpha$-RuCl${}_3$ revealed by local electric polarization
• Exchange interactions in $d^5$ Kitaev materials: From Na${}_2$IrO${}_3$ to $\alpha$-RuCl${}_3$
• Evidence for magnetic fractional excitations in a Kitaev quantum-spin-liquid candidate $\alpha$-RuCl${}_3$
• Non-Kitaev spin liquids in Kitaev materials

Cited by in corpus (1)

• Magnetic excitations in the Kitaev material Na${}_2$IrO${}_3$ studied by neutron scattering