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Boson-peak-like anomaly caused by transverse phonon softening in strain glass

Author

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  • Shuai Ren

    (Chinese Academy of Sciences)

  • Hong-Xiang Zong

    (Xi’an Jiaotong University)

  • Xue-Fei Tao

    (Xi’an Jiaotong University)

  • Yong-Hao Sun

    (Chinese Academy of Sciences)

  • Bao-An Sun

    (Chinese Academy of Sciences)

  • De-Zhen Xue

    (Xi’an Jiaotong University)

  • Xiang-Dong Ding

    (Xi’an Jiaotong University)

  • Wei-Hua Wang

    (Chinese Academy of Sciences)

Abstract

Strain glass is a glassy state with frozen ferroelastic/martensitic nanodomains in shape memory alloys, yet its nature remains unclear. Here, we report a glassy feature in strain glass that was thought to be only present in structural glasses. An abnormal hump is observed in strain glass around 10 K upon normalizing the specific heat by cubed temperature, similar to the boson peak in metallic glass. The simulation studies show that this boson-peak-like anomaly is caused by the phonon softening of the non-transforming matrix surrounding martensitic domains, which occurs in a transverse acoustic branch not associated with the martensitic transformation displacements. Therefore, this anomaly neither is a relic of van Hove singularity nor can be explained by other theories relying on structural disorder, while it verifies a recent theoretical model without any assumptions of disorder. This work might provide fresh insights in understanding the nature of glassy states and associated vibrational properties.

Suggested Citation

  • Shuai Ren & Hong-Xiang Zong & Xue-Fei Tao & Yong-Hao Sun & Bao-An Sun & De-Zhen Xue & Xiang-Dong Ding & Wei-Hua Wang, 2021. "Boson-peak-like anomaly caused by transverse phonon softening in strain glass," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26029-w
    DOI: 10.1038/s41467-021-26029-w
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    Cited by:

    1. Jiangtao Wu & Yifei Lin & Mingfang Shu & Yifei Liu & Yupeng Ma & Gaoting Lin & Cuiping Zhang & Pengfei Jiao & Fengfeng Zhu & Yan Wu & Russell A. Ewings & Helen C. Walker & Guochu Deng & Songxue Chi & , 2024. "Uncovering the phonon spectra and lattice dynamics of plastically deformable InSe van der Waals crystals," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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