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首页> 外文期刊>Philosophical magazine, B. Physics of condensed matter, electronic, optical, and magnetic properties >Hopping in a rearranging structure
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Hopping in a rearranging structure

机译：在重新排列结构中跳跃

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We discuss a simple model for the localized hopping of a charged particle in a rearranging structural environment, whose dynamics are described by an overdamped Brownian motion. We find that the dipolar relaxation strongly depends on how the bare jump frequency nu of the particle and the characteristic structural relaxation time tau(s), of its environment relate to each other. For nu tau(s) 1 the imaginary part of the dielectric susceptibility chi"(omega) exhibits a single-peak pattern, while for nu tau(s) greater than or similar to 1 a second smaller peak appears at higher frequencies, which becomes more separated from the first peak with increasing nu tau(s). It is suggested that this behaviour provides an explanation for the decoupling phenomenon of secondary beta relaxations from the main primary alpha relaxations as is often observed close to a glass transition. [References: 16]
机译：我们讨论了在重排结构环境中带电粒子的局部跳变的简单模型，其动力学由过阻尼的布朗运动描述。我们发现，偶极弛豫在很大程度上取决于粒子的裸跳频率nu和其环境的特征结构弛豫时间tau（s）如何相互关联。对于 1的nu，介电敏感性chi“（Ω）的虚部表现出单峰模式，而对于大于或接近1的nu，在更高的频率出现一个较小的峰值，提示，这种现象为次级β弛豫与主要的主要α弛豫的解耦现象提供了解释，这通常在接近玻璃化转变的时候观察到。参考：16]

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