Lattice-Tuned Magnetism of Ru4+(4d4) Ions in Single-Crystals of the Layered Honeycomb Ruthenates: Li2RuO3 and Na2RuO3

Wang, J. C.; Terzic, J.; Qi, T. F.; Ye, Feng; Yuan, S. J.; Aswartham, S.; Streltsov, S. V.; Khomskii, D. I.; Kaul, R. K.; Cao, G.

doi:10.1103/PhysRevB.90.161110

arXiv 2014-08-22 DOI 10.1103/PhysRevB.90.161110 0 مشاهدة

Lattice-Tuned Magnetism of Ru4+(4d4) Ions in Single-Crystals of the Layered Honeycomb Ruthenates: Li2RuO3 and Na2RuO3

Wang, J. C. · Terzic, J. · Qi, T. F. · Ye, Feng · Yuan, S. J. · Aswartham, S. · Streltsov, S. V. · Khomskii, D. I. · Kaul, R. K. · Cao, G.

Strongly Correlated Electrons

الأصل · EN

We synthesize and study single crystals of the layered honeycomb lattice Mott insulators Na2RuO3 and Li2RuO3 with magnetic Ru4+(4d4) ions. The newly found Na2RuO3 features a nearly ideal honeycomb lattice and orders antiferromagnetically at 30 K. Single-crystals of Li2RuO3 adopt a honeycomb lattice with either C2/m or more distorted P21/m below 300 K, depending on detailed synthesis conditions. We find that Li2RuO3 in both structures hosts a well-defined magnetic state, in contrast to the singlet ground state found in polycrystalline Li2RuO3. A phase diagram generated based on our results uncovers a new, direct correlation between the magnetic ground state and basal-plane distortions in the honeycomb ruthenates.

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