扩展的自由能量函数的阿奇拉和奇拉铁电阴性液晶:理论和模拟
Yu Zou1,2, Satoshi Aya1,2
1South China Advanced Institute for Soft Matter Science and Technology (AISMST), School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China. satoshiaya@scut.edu.cn.
我们开发了一种兰道型的平均场理论,用于极性阴性液晶,打破反向对称. 这一理论解释了铁电行为,并预测了新型液晶相中的结构过渡.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 液晶科学 液晶科学
背景情况:
- 极地无极体液晶代表了新的凝聚物质状态,打破了传统的无极体无极体反转对称.
- 迫切需要理论框架来描述这些新出现的铁电液晶相.
研究的目的:
- 开发Landau类型的平均场理论,用于Achiral和Chiral铁电磁体.
- 阐明极性阴性相态的理论基础及其独特性质.
主要方法:
- 开发一个兰道型的平均场理论,结合了由于反向对称性破裂的新贡献.
- 包括一个奇特的弹性术语 (弹性电流),静电效应,以及局部极化梯度的兰道术语.
- 考虑标量顺序参数和极化顺序之间的合.
主要成果:
- 该理论解释了极性阴性状态的三个新贡献:柔电,静电效应和极化梯度.
- 在奇拉极性阴性学中,扭曲弹性和极性之间的竞争决定了压缩能量.
- 成功模拟了铁电阴性液滴从状到直线偏斜拓学的结构过渡.
结论:
- 开发的理论提供了极性阴性液晶的基本描述.
- 它提供了一个框架,用于预测和实验测试新兴极性液晶系统中的结构.
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