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PreprintarXiv licencearXiv

Counting kinks and magnons with the lattice: magnetoelastic effects in Cs2CoBr4

  • V. Romerio
  • J. Nagl
  • K. Yu. Povarov
  • S. Gvasaliya
  • A. Zheludev
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Abstract

We report low-temperature dilatometry and ultrasound measurements on the frustrated quasi-one-dimensional antiferromagnet Cs2CoBr4 across the entire cascade of field-induced magnetic phase transitions. The whole phase diagram can be recovered from these lattice probes, with distinct anomalies observed at each phase boundary. Elongation along the principal chain axis is found to closely track magnetization throughout the phase diagram. This behavior is interpreted in terms of kinks in the Néel structure and magnons in the transverse-ordered magnetic-BEC phases, each carrying a fixed lattice distortion. A simultaneous analysis of ultrasound and striction data allows us to quantify the strength of magnetoelastic coupling.

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Cite

BibTeXRIS
BibTeX
@misc{romerio2026counting,
  title = {{Counting kinks and magnons with the lattice: magnetoelastic effects in Cs$_2$CoBr$_4$}},
  author = {V. Romerio and J. Nagl and K. Yu. Povarov and S. Gvasaliya and A. Zheludev},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.41619},
  eprint = {2610.41619},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.41619},
}
RIS
TY  - UNPB
TI  - Counting kinks and magnons with the lattice: magnetoelastic effects in Cs_2CoBr_4
AU  - V. Romerio
AU  - J. Nagl
AU  - K. Yu. Povarov
AU  - S. Gvasaliya
AU  - A. Zheludev
PY  - 2026
DA  - 2026/10/30
PB  - arXiv
DO  - 10.48550/arxiv.2610.41619
UR  - https://arxiv.org/abs/2610.41619
AB  - We report low-temperature dilatometry and ultrasound measurements on the frustrated quasi-one-dimensional antiferromagnet Cs_2CoBr_4 across the entire cascade of field-induced magnetic phase transitions. The whole phase diagram can be recovered from these lattice probes, with distinct anomalies observed at each phase boundary. Elongation along the principal chain axis is found to closely track magnetization throughout the phase diagram. This behavior is interpreted in terms of kinks in the Néel structure and magnons in the transverse-ordered magnetic-BEC phases, each carrying a fixed lattice distortion. A simultaneous analysis of ultrasound and striction data allows us to quantify the strength of magnetoelastic coupling.
ER  -