Defect control in the Heisenberg-Kitaev candidate material NaRuO${}_2$

Abstract

The combination of geometric frustration, extended hopping, spin-orbit coupling, and a disordered magnetic ground state make NaRuO${}_2$ an attractive Heisenberg-Kitaev candidate material. Historically, NaRuO${}_2$ has been a challenging material to produce, even in polycrystalline form. Here we present synthetic efforts that identify a propensity for Na${}_{\text{Ru}}$ defects to form in NaRuO${}_2$, revealing a full solid-solution between NaRuO${}_2$ and disordered Na${}_2$RuO${}_3$. We report the synthesis of alloys along the Na${}_{3+x}$Ru${}_{3-x}$O${}_6$ solid solution and characterize changes in the bulk magnetization and electron transport as a function of Na-loading. Our results highlight the importance of stoichiometry control in NaRuO${}_2$ when investigating and interpreting this material's physical properties.

References in corpus (4)

• Continuous excitations of the triangular-lattice quantum spin liquid YbMgGaO4
• Lattice-Tuned Magnetism of Ru4+(4d4) Ions in Single-Crystals of the Layered Honeycomb Ruthenates: Li2RuO3 and Na2RuO3
• Floating zone growth of α-Na${}_{0.90}$MnO${}_2$ single crystals
• Correlated electron metal properties of the honeycomb ruthenate Na${}_2$RuO${}_3$

Cited by in corpus (1)

• Impurity-induced moment freezing in NaFe${}_x$Ru${}_{1-x}$O${}_2$