Cubic blue phases in electric fields
Cubic blue phases in electric fields
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DOI：
10.1209/0295-5075/81/66004
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
G. P. Alexander;D. Marenduzzo
中科院分区：
文献类型：
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作者：
G. P. Alexander;D. Marenduzzo
我们数值研究了外加电场对立方蓝相物理性质的影响。完整的流体动力学方程的运动通过格子玻尔兹曼算法，导致一个精确的最小化的朗道-德Gennes自由能在稳定状态下解决。这种技术能够再现所有主要的实验结果，包括蓝相I的反常电致伸缩和场诱导蓝相X的转变。我们的模拟也捕捉到了开关的动态，我们确定了双扭曲圆柱体和向错线在低场强下的变形，以及网络在过渡期间重新排列的路径。
We investigate numerically the effect of an applied electric field on the physics of cholesteric cubic blue phases. The full hydrodynamic equations of motion are solved via a lattice Boltzmann algorithm which leads to an exact minimisation of the Landau-de Gennes free energy in steady state. This technique is able to reproduce all the main experimental findings including the anomalous electrostriction of blue phase I and the field induced transition to blue phase X. The dynamics of switching is also captured by our simulations and we identify the deformation of double twist cylinders and disclination lines at low field strength as well as the pathway by which the network rearranges during transitions.