Anomaly of the nonergodicity parameter and crossover to white noise in the fast relaxation spectrum of a simple glass former.
Anomaly of the nonergodicity parameter and crossover to white noise in the fast relaxation spectrum of a simple glass former.
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简单玻璃形成体的快速弛豫谱中非遍历性参数的异常和与白噪声的交叉。
DOI：
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发表时间：
2001
影响因子：
8.6
通讯作者：
J. Wiedersich
中科院分区：
文献类型：
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作者：
S. Adichtchev;S. Benkhof;T. Blochowicz;V. Novikov;E. Rössler;C. Tschirwitz;J. Wiedersich
我们提出了准弹性光散射和介电光谱的玻璃前体α-甲基吡啶。在高温下，极化率极小值的演化可以用模耦合理论（MCT）很好地描述。在临界温度T（c）以下，由于α过程的过剩翼的出现，MCT的简单标度律失效，这显示出作为log（10）τ（α）的函数的普遍演化。然而，考虑到这一点，我们观察到预测的尖点异常的非遍历参数以及交叉到“白色噪声。"
We present quasielastic light scattering and dielectric spectra of the glass former alpha-picoline. At high temperatures the evolution of the susceptibility minimum is well described by the mode coupling theory (MCT). Below the critical temperature T(c) the simple scaling laws of MCT fail due to the appearance of the excess wing of the alpha process, which shows a universal evolution as a function of log(10)tau(alpha). Taking this into account, however, we observe the predicted cusplike anomaly of the nonergodicity parameter as well as a crossover to "white noise."