Lattice-tuned magnetism of Ru4+(4d4) ions in single crystals of the layered honeycomb ruthenates Li2RuO3 and Na2RuO3

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

doi:10.1103/PhysRevB.90.161110

Lattice-tuned magnetism of Ru4+(4d4) ions in single crystals of the layered honeycomb ruthenates Li2RuO3 and Na2RuO3

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

Single Crystal Diffraction

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Abstract

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.

Original language	English
Article number	161110
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.90.161110
State	Published - Oct 29 2014

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Wang, J. C., Terzic, J., Qi, T. F., Ye, F., Yuan, S. J., Aswartham, S., Streltsov, S. V., Khomskii, D. I., Kaul, R. K., & Cao, G. (2014). Lattice-tuned magnetism of Ru4+(4d4) ions in single crystals of the layered honeycomb ruthenates Li2RuO3 and Na2RuO3. Physical Review B - Condensed Matter and Materials Physics, 90(16), Article 161110. https://doi.org/10.1103/PhysRevB.90.161110

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title = "Lattice-tuned magnetism of Ru4+(4d4) ions in single crystals of the layered honeycomb ruthenates Li2RuO3 and Na2RuO3",

abstract = "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.",

author = "Wang, {J. C.} and J. Terzic and Qi, {T. F.} and Feng Ye and Yuan, {S. J.} and S. Aswartham and Streltsov, {S. V.} and Khomskii, {D. I.} and Kaul, {R. K.} and G. Cao",

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doi = "10.1103/PhysRevB.90.161110",

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T1 - Lattice-tuned magnetism of Ru4+(4d4) ions in single crystals of the layered honeycomb ruthenates Li2RuO3 and Na2RuO3

AU - Wang, J. C.

AU - Terzic, J.

AU - Qi, T. F.

AU - Ye, Feng

AU - Yuan, S. J.

AU - Aswartham, S.

AU - Streltsov, S. V.

AU - Khomskii, D. I.

AU - Kaul, R. K.

AU - Cao, G.

PY - 2014/10/29

Y1 - 2014/10/29

N2 - 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.

AB - 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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U2 - 10.1103/PhysRevB.90.161110

DO - 10.1103/PhysRevB.90.161110

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SN - 1098-0121

VL - 90

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 16

M1 - 161110

ER -

Lattice-tuned magnetism of Ru4+(4d4) ions in single crystals of the layered honeycomb ruthenates Li2RuO3 and Na2RuO3

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