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Power laws in pressure-induced structural change of glasses

Author

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  • Huijun Zhang

    (The Hong Kong University of Science and Technology)

  • Kaiyao Qiao

    (The Hong Kong University of Science and Technology)

  • Yilong Han

    (The Hong Kong University of Science and Technology)

Abstract

Many glasses exhibit fractional power law (FPL) between the mean atomic volume va and the first diffraction peak position q1, i.e. $$v_{\mathrm{a}} \propto q_1^{ - d}$$va∝q1−d with d ≃ 2.5 deviating from the space dimension D = 3, under compression or composition change. What structural change causes such FPL and whether the FPL and d are universal remain controversial. Here our simulations show that the FPL holds in both two- and three-dimensional glasses under compression when the particle interaction has two length scales which can induce nonuniform local deformations. The exponent d is not universal, but varies linearly with the deformable part of soft particles. In particular, we reveal an unexpected crossover regime with d > D from crystal behavior (d = D) to glass behavior (d

Suggested Citation

  • Huijun Zhang & Kaiyao Qiao & Yilong Han, 2020. "Power laws in pressure-induced structural change of glasses," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15583-4
    DOI: 10.1038/s41467-020-15583-4
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