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.
Xing et al. (2026) studied this question.