التفاصيل البيبلوغرافية
| العنوان: |
A molecular perspective on the emergence of long-range polar order from an isotropic fluid |
| المؤلفون: |
Erkoreka, Aitor, Sebastián, Nerea, Mertelj, Alenka, Martinez-Perdiguero, Josu |
| سنة النشر: |
2024 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Soft Condensed Matter |
| الوصف: |
The ferroelectric nematic phase (N$_{\text{F}}$) has quickly become the most studied system in liquid crystal research. In this work, we investigate the origin of such polar structure by studying a compound for which the N$_{\text{F}}$ phase directly follows the isotropic liquid phase on cooling, making it a particularly interesting system. Our experimental results evidence the presence of polar correlations already in the high-temperature phase, in which ferroelectric order can be induced under a sufficiently strong electric field. In the N$_{\text{F}}$ phase, molecular dynamics and polar correlations are investigated through detailed dynamic dielectric measurements, while second harmonic generation experiments evidence a large value of the main coefficient of the second order dielectric susceptibility tensor. Lastly, experimentally determined parameters are employed for calculations based on a recently proposed theoretical model for the stability of the N$_{\text{F}}$ phase. The obtained results suggest that the parallel alignment of dipoles is driven by a subtle interplay between electrostatic and excluded volume interactions. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1016/j.molliq.2024.125188 |
| URL الوصول: |
http://arxiv.org/abs/2405.10965 |
| رقم الانضمام: |
edsarx.2405.10965 |
| قاعدة البيانات: |
arXiv |