Magnetism of Kitaev spin-liquid candidate material RuBr${}_3$

Abstract

The ruthenium halide $\alpha$-RuCl${}_3$ is a promising candidate for a Kitaev spin liquid. However, the microscopic model describing $\alpha$-RuCl${}_3$ is still debated partly because of a lack of analogue materials for $\alpha$-RuCl${}_3$, which prevents tracking of electronic properties as functions of controlled interaction parameters. Here, we report a successful synthesis of RuBr${}_3$. The material RuBr${}_3$~possesses BiI${}_3$-type structure (space group: $R\overline{3}$) where Ru${}^{3+}$ form an ideal honeycomb lattice. Although RuBr${}_3$ has a negative Weiss temperature, it undergoes a zigzag antiferromagnetic transition at $T_{\mathrm{N}}=34$ K, as does $\alpha$-RuCl${}_3$. Our analyses indicate that the Kitaev and non-Kitaev interactions can be modified in ruthenium trihalides by changing the ligand sites, which provides a new platform for exploring Kitaev spin liquids.

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• Magnetism in Kitaev Quantum Spin Liquid Candidate RuBr${}_3$
• Quantum spin Hall effect protected by spin U(1) quasisymmetry
• Quantum many-body scars in spin-1 Kitaev chain with uniaxial single-ion anisotropy
• $J=1/2$ Pseudospins and $d$-$p$ Hybridization in the Kitaev Spin Liquid Candidates Ru$X_3$ ($X$ = Cl, Br, I)
• Topological phase diagrams of in-plane field polarized Kitaev magnets
• Magnetic versus nonmagnetic polymorphs of RuBr${}_3$ under pressure
• Anisotropic magnetic interactions in a candidate Kitaev spin liquid close to a metal-insulator transition
• Proximity-induced sequence of field transitions in Kitaev candidate BaCo${}_2$(AsO${}_4$)${}_2$
• Lattice and magnetic structure in the van der Waals antiferromagnet VBr3
• Anisotropy of the zigzag order in the Kitaev honeycomb magnet $\alpha$-RuBr${}_3$
• A Layered Spin 1/2 polymorph of titanium triiodide
• High-field quantum spin liquid transitions and angle-field phase diagram of Kitaev magnet $\alpha$-RuCl${}_3$
• Possible Realization of Kitaev Spin Liquids in van der Waals Heterostructures of $\alpha$-RuCl${}_3$ and Cr$X_3$ ($X$=Cl and I)
• Real-time control of non-Abelian anyons in Kitaev spin liquid under energy dissipation
• Pressure-dependent magnetism of the Kitaev candidate Li${}_2$RhO${}_3$
• Low-temperature spin dynamics and absence of magnetic order in layered $\alpha$-RuI${}_3$
• Correlated Dirac semimetal states in nonsymmorphic MIrO${}_3$ (M=Sr, Ba and Ca)