Ferroelectric phases in a chiral bent-core smectic liquid crystal: Dielectric and optical second-harmonic generation measurements
2000; American Physical Society; Volume: 62; Issue: 4 Linguagem: Inglês
10.1103/physreve.62.r4524
ISSN1538-4519
AutoresEwa Górecka, Damian Pociecha, Fumito Araoka, Darren R. Link, Michi Nakata, Jirakorn Thisayukta, Yoichi Takanishi, Ken Ishikawa, Junji Watanabe, Hideo Takezoe,
Tópico(s)Plant Reproductive Biology
ResumoWe report unambiguous evidence for ferroelectricity in a chiral bent-core liquid crystal. This evidence includes (i) a single current peak in the polarization reversal current, (ii) a strong dielectric response that is suppressed by applying a bias electric field, and (iii) strong optical second-harmonic generation in the absence of electric field even at normal incidence. We propose a phase structure that is anticlinic in tilt and ferroelectric in polar order, i.e., smectic-C(A)P(*)(F).
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