Hydrated lithium intercalation into the Kitaev spin liquid candidate material $\alpha -$RuCl${}_3$

Abstract

We study on transport and magnetic properties of hydrated and lithium-intercalated $\alpha$-RuCl${}_3$, Li${}_x$RuCl${}_3\cdot y$H${}_2$O, for investigating the effect on mobile-carrier doping into candidate materials for a realization of a Kitaev model. From thermogravitometoric and one-dimensional electron map analyses, we find two crystal structures of this system, that is, mono-layer hydrated Li${}_x$RuCl${}_3\cdot y$H${}_2$O~$(x\approx 0.56,y\approx 1.3)$ and bi-layer hydrated Li${}_x$RuCl${}_3\cdot y$H${}_2$O~$(x\approx 0.56,y\approx 3.9)$. The temperature dependence of the electrical resistivity shows a temperature hysteresis at 200-270 K, which is considered to relate with a formation of a charge order. The antiferromagnetic order at 7-13 K in pristine $\alpha$-RuCl${}_3$~ is successfully suppressed down to 2 K in bi-layer hydrated Li${}_x$RuCl${}_3\cdot y$H${}_2$O, which is sensitive to not only an electronic state of Ru but also an interlayer distance between Ru-Cl planes.

arXiv comment7 pages, 5 figures

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Cited by in corpus (4)

• STM as a single Majorana detector of Kitaev's chiral spin liquid
• Magnetism of Kitaev spin-liquid candidate material RuBr${}_3$
• Strongly electron-correlated semimetal RuI${}_3$ with a layered honeycomb structure
• Honeycomb lattice iridate on the verge of Mott-collapse