期刊
PHYSICAL REVIEW B
卷 90, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.161110
关键词
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资金
- National Science Foundation [DMR-0856234, DMR-1265162, DMR-1056536]
- Russian Science Foundation via RSCF Grant [14-22-00004]
- German project, Cologne University via German excellence initiative [FOR 1346]
- DOE BES Office
- China Scholarship Council
- Direct For Mathematical & Physical Scien [1056536] Funding Source: National Science Foundation
- Division Of Materials Research [1056536] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1265162] Funding Source: National Science Foundation
We synthesize and study single crystals of the layered honeycomb lattice Mott insulators Na2RuO3 and Li2RuO3 with magnetic Ru4+(4d(4)) 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 P2(1)/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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