ROTATIONAL DIFFUSION OF UNIAXIAL PROBES IN BIAXIAL LIQUID-CRYSTAL PHASES
ROTATIONAL DIFFUSION OF UNIAXIAL PROBES IN BIAXIAL LIQUID-CRYSTAL PHASES
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DOI：
10.1063/1.465912
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发表时间：
1993-10-15
影响因子：
4.4
通讯作者：
ZANNONI, C
中科院分区：
文献类型：
--
作者：
BERGGREN, E;TARRONI, R;ZANNONI, C
本文讨论了圆柱对称探针在双轴正交介质中的重定向问题。本文首次给出了棒形或盘形单轴探针在双轴对称介质中重定向时的旋转扩散方程。我们计算的第一和第二秩相关函数在单轴和双轴相位，通过单轴-双轴相变的兴趣（如谱密度）的动态观测值的演变的可能性。非微扰和近似的解析解。
We discuss the reorientation of a cylindrically symmetric probe in a biaxial orthorombic medium, such as a biaxial nematic. We write down and solve for the first time the rotational diffusion equation for a rod-like or disc-like uniaxial probe reorienting in a medium of biaxial symmetry. We calculate first and second rank correlation functions both in the uniaxial and biaxial phase, giving the possibility of following the evolution of dynamic observables of interest (e.g. spectral densities) through the uniaxial-biaxial phase transition. Nonperturbative and approximate analytical solutions are provided.