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April 3, 2026Newton0 citationsOpen Access

Universal bifurcation in glass relaxation dynamics revealed by ultra-low-frequency spectroscopy

GXG.H. XingNorthwestern Polytechnical UniversityQHQi HaoPai Chai UniversityJCJingbo CuiNorthwestern Polytechnical University

Key Points

  • To investigate the ultra-slow relaxation dynamics of glassy materials and establish a unified framework for understanding glass kinetics.
  • Utilized static square-wave mechanical spectroscopy.
  • Probed the microhertz regime with high precision.
  • Analyzed dynamic behavior between VFT and exponential temperature dependence.
  • Revealed a universal dynamical transition in deep glassy states.
  • Demonstrated intrinsic correlation between alpha and beta relaxations.
  • Quantitatively verified previously theoretical predictions on relaxation dynamics.

Abstract

Understanding the ultra-slow relaxation dynamics of glassy materials is a fundamental challenge.Xing et al. introduce static square-wave mechanical spectroscopy to probe the microhertz regime with high precision, revealing a universal dynamical transition from VFT to apparent exponential temperature dependence in the deep glassy state and quantitatively verifying the intrinsic correlation between and -relaxations, establishing a unified physical framework for glass kinetics.

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Cite This Study

Xing et al. (2026) studied this question.

synapsesocial.com/papers/69cf5ced5a333a821460a703https://doi.org/10.1016/j.newton.2026.100472
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