Direct probe of magnetic field effects on phonons by ultrasound propagation in the quasi-two-dimensional honeycomb magnet Na2Co2TeO6

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The study reveals strong spin-lattice coupling in the Co-based honeycomb magnet, demonstrated by sound velocity and attenuation.
Sound velocity was found to change significantly below the Néel temperature of 27 K, indicating ferrimagnetic order.
Data analysis supports a triple-Q ground state in the honeycomb magnet, linking phonons to magnetic properties.
Comparative analysis with thermal transport indicates significant contributions of phonons to observed behaviors.

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Observational analysis reveals phonon behavior under magnetic field in a Co-based honeycomb magnet, indicating significant spin-lattice coupling.

Hong et al. (2025) studied this question.

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Observational analysis reveals phonon behavior under magnetic field in a Co-based honeycomb magnet, indicating significant spin-lattice coupling.