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Trigonal distortion in the honeycomb iridates: Proximity of zigzag and spiral phases in Na2IrO3

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arxiv 1408.4811 v1 pith:NEICVVOZ submitted 2014-08-20 cond-mat.str-el

Jeffrey G. Rau , Hae-Young Kee This is my paper · ORCID
classification cond-mat.str-el
keywords distortionkitaevna2iro3zigzaghoneycombli2iro3magneticmodel
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The Kitaev honeycomb model has been suggested as a useful starting point to describe the honeycomb iridates. However, the zigzag ordering seen in Na2IrO3 and the magnetic transition in Li2IrO3 have raised questions to their connection to the Kitaev model and to the microscopic origin of these magnetic states, given their structural similarities. Here we study how the magnetic phases near the Kitaev spin liquid are affected by the inclusion of trigonal distortion of the oxygen octahedra within a purely nearest neighbour model. Using a combination classical analysis and exact diagonalization we show that near the ferromagnetic Kitaev limit a small amount of trigonal distortion, as found in Na2IrO3, stabilizes a zigzag phase. Decreasing the distortion destabilizes the zigzag phase toward a spiral phase that may be relevant for Li2IrO3. Using semi-classical spin-wave calculations we show that this regime is qualitatively consistent with experimentally known features of the dynamical structure factor in Na2IrO3 and speculate on implications for Li2IrO3.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Fully Generalized Spin Models with Strain Effects of Kitaev Spin Liquid Candidate Materials

    cond-mat.str-el 2025-05 conditional novelty 8.0 of 10

    A strain-extended version of the KJΓΓ' spin model, with first-principles coupling constants for α-RuCl3, predicts emergent exchange interactions and strain-tunable topological transitions.

  2. Anyon polarons as a window into the competing phases of the Kitaev-Gamma-Gamma' model

    cond-mat.str-el 2025-08 conditional novelty 7.0 of 10

    From the gap closings of anyons, the authors map the K-Γ-Γ' phase diagram and predict a magnetically ordered quantum spin liquid for the antiferromagnetic Kitaev model with negative Γ.

  3. Thermal Hall transport in Kitaev spin liquids

    cond-mat.str-el 2025-07 conditional novelty 7.0 of 10

    At intermediate temperatures, the thermal Hall conductivity divided by temperature in the extended Kitaev model overshoots the half-integer quantized value, with a hump that follows the sign of the Majorana Chern numb...

  4. The Saga of $\alpha$-RuCl$_3$: Parameters, Models, and Phase Diagrams

    cond-mat.str-el 2025-02 conditional novelty 6.0 of 10

    Using the tilt angle, high-field ESR gap, and critical-field difference, the authors constrain the anisotropic exchanges of the effective spin model of alpha-RuCl3 and identify two counter-rotating helical phases near...

  5. Phase diagram of the Kitaev-Heisenberg-$\Gamma$ model: Classical and quantum magnetism, frustration, and subdominant interactions

    cond-mat.str-el 2026-06 unverdicted novelty 4.0 of 10

    Numerical mapping of classical and quantum phase diagrams for the Kitaev-Heisenberg-Γ model identifies noncollinear multiple-Q orders and quantum-suppressed incommensurate phases with highly frustrated regions.

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