Sebastián Nerea, Čopič Martin, Mertelj Alenka
J. Stefan Institute, SI-1000 Ljubljana, Slovenia.
University of Ljubljana, Faculty of Mathematics and Physics, Ljubljana, Slovenia.
Phys Rev E. 2022 Aug;106(2-1):021001. doi: 10.1103/PhysRevE.106.021001.
Recent experimental realization of ferroelectric nematic liquid crystalline phases stimulated material development and numerous experimental studies of these phases, guided by their fundamental and applicative interest. In this Perspective, we give an overview of this emerging field by linking history and theoretical predictions to a general outlook of the development and properties of the materials exhibiting ferroelectric nematic phases. We will highlight the most relevant observations to date, e.g., giant dielectric permittivity values, polarization values an order of magnitude larger than in classical ferroelectric liquid crystals, and nonlinear optical coefficients comparable with several ferroelectric solid materials. Key observations of anchoring and electro-optic behavior will also be examined. The collected contributions lead to a final discussion on open challenges in materials development, theoretical description, experimental explorations, and possible applications of the ferroelectric phases.
铁电向列相液晶相最近在实验上的实现刺激了材料的发展以及对这些相的大量实验研究，这些研究受到其基本和应用方面兴趣的引导。在这篇展望文章中，我们通过将历史和理论预测与呈现铁电向列相的材料的发展及性质的总体展望联系起来，对这个新兴领域进行了概述。我们将重点介绍迄今为止最相关的观察结果，例如巨大的介电常数、比经典铁电液晶大一个数量级的极化值，以及与几种铁电固体材料相当的非线性光学系数。还将研究锚定和电光行为的关键观察结果。收集到的这些贡献引发了关于铁电相在材料开发、理论描述、实验探索以及可能应用方面的开放挑战的最终讨论。
