AI 中文总结
研究介晶二聚体中镜面对称与反演对称破缺，通过含柔性间隔基的同系二聚体系列实验，发现间隔基原子数偶数的二聚体呈现 NF 相有强极性有序，奇数的呈现 NTB 相有短节距螺旋指向矢结构。
AI 中文摘要
最近发现的扭曲弯曲向列相（NTB）和铁电向列相（NF）是液晶中自发对称破缺的不同例子。本文报道了在由柔性间隔基连接的两个强偶极介晶单元组成的同系二聚体系列中同时出现这两种向列相。对于间隔基原子数为偶数的二聚体观察到的 NF 相表现出强极性有序；对于间隔基原子数为奇数的二聚体观察到的 NTB 相则形成短节距螺旋指向矢结构。
英文摘要
The recently discovered twist-bend nematic NTB and ferroelectric nematic NF phases are distinct examples of spontaneous symmetry breaking in liquid crystals. Here, we report the occurrence of both type nematic phases within the same homologous series of dimers consisting of two strongly dipolar mesogenic units linked by a flexible spacer. The NF phase, observed for dimers having spacer with even number of atoms, exhibits the strong polar order; in the NTB phase, observed for dimers with odd number of atoms in the spacer, short-pitch heliconical director structure develops.
