Magnetoelastic couplings in the deformed kagome quantum spin lattice of volborthite

Akihiko Ikeda, Shunsuke Furukawa, Oleg Janson, Yasuhiro H. Matsuda, Shojiro Takeyama, Takeshi Yajima, Zenji Hiroi, Hajime Ishikawa

Research output: Contribution to journalArticle

Abstract

Microscopic spin interactions on a deformed kagome lattice of volborthite are investigated through magnetoelastic couplings. A negative longitudinal magnetostriction ΔL/L<0 in the b axis is observed, which depends on the magnetization M with a peculiar relation of ΔL/L�M1.3. Based on the exchange striction model, it is argued that the negative magnetostriction originates from a pantographlike lattice change of the Cu-O-Cu chain in the b axis, and that the peculiar dependence arises from the local spin correlation. This idea is supported by DFT+U calculations simulating the lattice change and a finite-size calculation of the spin correlation, indicating that the recently proposed coupled-trimer model is a plausible one.

Original languageEnglish
Article number140412
JournalPhysical Review B
Volume99
Issue number14
DOIs
Publication statusPublished - 2019 Apr 29
Externally publishedYes

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Magnetostriction
magnetostriction
Discrete Fourier transforms
Magnetization
trimers
magnetization
interactions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Ikeda, A., Furukawa, S., Janson, O., Matsuda, Y. H., Takeyama, S., Yajima, T., ... Ishikawa, H. (2019). Magnetoelastic couplings in the deformed kagome quantum spin lattice of volborthite. Physical Review B, 99(14), [140412]. https://doi.org/10.1103/PhysRevB.99.140412

Magnetoelastic couplings in the deformed kagome quantum spin lattice of volborthite. / Ikeda, Akihiko; Furukawa, Shunsuke; Janson, Oleg; Matsuda, Yasuhiro H.; Takeyama, Shojiro; Yajima, Takeshi; Hiroi, Zenji; Ishikawa, Hajime.

In: Physical Review B, Vol. 99, No. 14, 140412, 29.04.2019.

Research output: Contribution to journalArticle

Ikeda, A, Furukawa, S, Janson, O, Matsuda, YH, Takeyama, S, Yajima, T, Hiroi, Z & Ishikawa, H 2019, 'Magnetoelastic couplings in the deformed kagome quantum spin lattice of volborthite', Physical Review B, vol. 99, no. 14, 140412. https://doi.org/10.1103/PhysRevB.99.140412
Ikeda, Akihiko ; Furukawa, Shunsuke ; Janson, Oleg ; Matsuda, Yasuhiro H. ; Takeyama, Shojiro ; Yajima, Takeshi ; Hiroi, Zenji ; Ishikawa, Hajime. / Magnetoelastic couplings in the deformed kagome quantum spin lattice of volborthite. In: Physical Review B. 2019 ; Vol. 99, No. 14.
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