Effect of delithiation on the dimer transition of the honeycomb-lattice ruthenate Li2-xRuO3
Abstract
The honeycomb-lattice ruthenate Li2RuO3 is made heavily Li-deficient by chemical oxidation by iodine. The delithiation triggers a different phase Li2-xRuO3, the "D-phase", with superlattice. For the first time we disclose the magnetic and structural properties of the D-phase in the dimer-solid state. The low temperature magnetic susceptibility and the bond lengths indicate a bonding configuration consisting of both Ru4+-Ru4+ and Ru5+-Ru5+ dimers.
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