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Multiorder and the Structural Mechanism of the LiRh2O4 Tetragonal Phase Formation

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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

Results are presented from a group-theoretical analysis of phase transitions in LiRh2O4. It is found that the critical irreducible representation inducing phase transitions and multiorder in this substance is eight-dimensional representation k11τ5 \(\left( {{{\Gamma}}_{3}^{ + }} \right)\) + k10τ2 (X4). It is shown that the multiorder and structural mechanism of the formation of the tetragonal phase of lithium rhodonite are related to displacements of oxygen atoms, the tilts of [RhO]6 octahedra, and the ordering of rhodium t2g orbitals.

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Notes

  1. Irreducible representations are denoted using Kovalev’s system (with indication of the wave vector and number of the irreducible representation) [18]. The IR labels in brackets correspond to Miller and Love’s notation [19].

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Funding

This work was supported by the Russian Science Foundation, project no. 22-22-00183.

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Authors and Affiliations

  1. Southern Federal University, 344090, Rostov-on-Don, Russia

    M. V. Talanov

  2. Federal Research Centre “The Southern Scientific Centre,” Russian Academy of Sciences, 344006, Rostov-on-Don, Russia

    V. B. Shirokov

  3. Platov South Russian State Polytechnic University, 346428, Novocherkassk, Russia

    V. M. Talanov & M. S. Aulov

Authors
  1. M. V. Talanov
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  2. V. B. Shirokov
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  3. V. M. Talanov
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  4. M. S. Aulov
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Correspondence to M. V. Talanov.

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Translated by A. Nikol’skii

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Talanov, M.V., Shirokov, V.B., Talanov, V.M. et al. Multiorder and the Structural Mechanism of the LiRh2O4 Tetragonal Phase Formation. Bull. Russ. Acad. Sci. Phys. 87, 1263–1269 (2023). https://doi.org/10.3103/S1062873823703136

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