Article Relationship between the boson peak and first sharp diffraction peak in glasses

Dan Kyotani ; Soo Han Oh ; Suguru Kitani ; Yasuhiro Fujii ; Hiroyuki Hijiya ; Hideyuki Mizuno ; Shinji Kohara SAMURAI ORCID (National Institute for Materials Science) ; Akitoshi Koreeda ; Atsunobu Masuno ; Hitoshi Kawaji ; Seiji Kojima ; Yohei Yamamoto ; Tatsuya Mori

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Dan Kyotani, Soo Han Oh, Suguru Kitani, Yasuhiro Fujii, Hiroyuki Hijiya, Hideyuki Mizuno, Shinji Kohara, Akitoshi Koreeda, Atsunobu Masuno, Hitoshi Kawaji, Seiji Kojima, Yohei Yamamoto, Tatsuya Mori. Relationship between the boson peak and first sharp diffraction peak in glasses. Scientific Reports. 2025, 15 (), 9617.

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(abstract)

Boson peak (BP) dynamics refers to the universal excitation in the terahertz region of glass. In this study, the universal dynamics of BP were quantitatively evaluated in various glassy materials based on the heterogeneous elasticity theory (HET), and the determinants of BP were successfully extracted. A strong correlation was observed between the maximum possible coarse-graining wavenumber, which is a determinant of the BP in the HET, and the first sharp diffraction peak (FSDP) wavenumber, which is a characteristic index of the medium-range order in glasses. The results indicate that the behaviour of BP in glass can be quantitatively understood in the following two steps. First, the FSDP representing the largest structural correlation in glass is dominantly used to determine the unit size of the elastic modulus heterogeneity, and second, the magnitude of the elastic modulus fluctuation is used to determine the frequency and intensity of the BP.

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Keyword: Glass, Boson Peak, First Sharp Diffraction Peak

Date published: 2025-03-20

Publisher: Springer Science and Business Media LLC

Journal:

  • Scientific Reports (ISSN: 20452322) vol. 15 9617

Funding:

  • Japan Society for the Promotion of Science 20H05878
  • Japan Society for the Promotion of Science 23H01139
  • AGC research collaboration
  • GIC & NGF
  • Japan Society for the Promotion of Science 23H04495

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1038/s41598-025-94454-8

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Updated at: 2025-04-02 09:51:07 +0900

Published on MDR: 2025-04-02 18:09:46 +0900

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