Reexamination of the evolution of the dynamic susceptibility of the glass former glycerol.
Reexamination of the evolution of the dynamic susceptibility of the glass former glycerol.
复制标题
重新审视玻璃前体甘油的动态磁化率的演变。
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
E. Rössler
中科院分区：
文献类型：
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作者：
S. Adichtchev;T. Blochowicz;C. Tschirwitz;V. Novikov;E. Rössler
由Lunkenheimer等人编制的甘油的介电数据[Contemp.物理41，15（2000）]内的现象学的方法，一方面，并在模式耦合理论（MCT），另一方面重新分析。我们提出了一个完整的插值的介电数据，覆盖17个十年的频率。从低温下缓慢响应的现象学分析中提取并由冷却时多余机翼的出现定义的交叉温度与从高温下动力学的MCT分析中提取的临界温度非常一致，包括Lunkenheimer等人在甘油的第一次MCT分析中未使用的数据。77，318（1996）]。发现交叉温度为T（c）=288+/-3K，这明显高于先前报道的。提取非遍历性参数f，由于f非常接近1，因此仅在检查1-f时才发现特征异常。观察到的非脆性系统甘油相对于脆弱的玻璃形成者的动态磁化率的演变没有差异，提供的动态的演变作为相关时间τ（α）的函数进行了研究。
The dielectric data of glycerol compiled by Lunkenheimer et al. [Contemp. Phys. 41, 15 (2000)] are reanalyzed within a phenomenological approach on the one hand, and within mode coupling theory (MCT), on the other. We present a complete interpolation of the dielectric data covering 17 decades in frequencies. The crossover temperature extracted from the phenomenological analysis of the slow response at low temperatures and defined by the emergence of the excess wing upon cooling agrees well with the critical temperature extracted from a MCT analysis of the dynamics at high temperatures including data that were not used in the first MCT analysis of glycerol by Lunkenheimer et al. [Phys. Rev. Lett. 77, 318 (1996)]. The crossover temperature is found to be T(c)=288+/-3 K, which is significantly higher than previously reported. Extracting the nonergodicity parameter f, the characteristic anomaly is only found when 1-f is inspected, since f is very close to 1. No difference for the evolution of the dynamic susceptibility is observed for the nonfragile system glycerol with respect to fragile glass formers provided that the evolution of the dynamics is studied as a function of the correlation time tau(alpha).