What does this research mean for the field?

Dilute ruthenium substitution in β-Li2IrO3 suppresses its incommensurate antiferromagnetic ground state and induces an anisotropic bulk spin glass state that preserves the underlying Kitaev exchange network. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Investigate how dilute ruthenium substitution perturbs magnetic interactions and ground-state order in single-crystal beta-Li2IrO3.

August 22, 2026npj Quantum MaterialsOpen Access

Anisotropic Kitaev spin glass in Li2RuxIr1−xO3

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Authors

MVMayia VranasUniversity of California, San Diego ARAlejandro RuizUniversity of California, San Diego VNVikram NagarajanUniversity of Minnesota

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Implication

Experimental characterization reveals an anisotropic spin glass in ruthenium-doped lithium iridate, indicating that disorder freezes spins within an active Kitaev exchange network.

Key Points

Investigate how dilute ruthenium substitution perturbs magnetic interactions and ground-state order in single-crystal beta-Li2IrO3.
Synthesized and characterized single crystals of beta-Li2RuxIr1-xO3 with dilute ruthenium doping (x <= 10%).
Probed magnetic, thermodynamic, and structural properties using magnetometry, resonant elastic X-ray scattering, ac-heat capacity, and muon spin relaxation/rotation.
Dilute ruthenium substitution suppressed long-range incommensurate antiferromagnetic order and induced a bulk spin glass state with frozen local magnetic fields.
The spin glass phase preserved strong directional anisotropy, demonstrated by enhanced b-axis magnetic susceptibility and direction-dependent thermoremanent relaxation.
Structural measurements showed the hyperhoneycomb lattice remained intact, confirming that disorder disrupts magnetic coherence without destroying bond-directional Kitaev exchange.

Cite This Study

Vranas et al. (2026) studied this question.

synapsesocial.com/papers/6a895e6bca7ade938187c8eb https://doi.org/10.1038/s41535-026-00935-y

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Implication

Experimental characterization reveals an anisotropic spin glass in ruthenium-doped lithium iridate, indicating that disorder freezes spins within an active Kitaev exchange network.

Anisotropic Kitaev spin glass in Li2RuxIr1−xO3

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Key Points

Cite This Study

Anisotropic Kitaev spin glass in Li2RuxIr1−xO3

Discussion

Member takes

Implication

Key Points

Cite This Study

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