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Revealing a hidden dynamic signature of the non-Arrhenius crossover in metallic glass-forming liquids
Scripta Materialia ( IF 6 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.scriptamat.2020.02.012
Nannan Ren , Lina Hu , Lijin Wang , Pengfei Guan

Abstract We report a scaling collapse of the temperature dependence of structural relaxation in 12 model metallic glass-forming liquids by introducing a characteristic temperature and characteristic time scale under constant dynamic heterogeneity condition. Moreover, we find the onset temperature of cooperative motions, TA, separating Arrhenius and non-Arrhenius behaviors of the relaxation time turns out to be one of the characteristic temperatures, which is evidenced by the constant dynamic heterogeneity at TA for all systems investigated. Our findings reveal a new dynamic signature hidden in TA and offer a new perspective, i.e., constant dynamic heterogeneity condition, to study metallic glass-forming liquids.

中文翻译:

揭示金属玻璃形成液体中非阿伦尼乌斯交叉的隐藏动态特征

摘要 我们通过在恒定动态非均质性条件下引入特征温度和特征时间尺度,报告了 12 种模型金属玻璃形成液体中结构弛豫的温度依赖性的尺度崩溃。此外,我们发现协作运动的起始温度 TA、弛豫时间的阿伦尼乌斯和非阿伦尼乌斯行为的分离结果是特征温度之一,这由所有研究的系统在 TA 处的恒定动态异质性证明。我们的研究结果揭示了隐藏在 TA 中的新动态特征,并提供了一个新的视角,即恒定的动态异质性条件,以研究金属玻璃形成液体。
更新日期:2020-05-01
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