Sequence of Four Orthogonal Smectic Phases in an Achiral Bent-Core Liquid Crystal: Evidence for the SmAP(alpha) Phase
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2011Access:
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Panarin, YP, Nagaraj, M, Sreenilayam, S, Vij, JK, Lehmann, A, Tschierske, C, Sequence of Four Orthogonal Smectic Phases in an Achiral Bent-Core Liquid Crystal: Evidence for the SmAP(alpha) Phase, Physical Review Letters, 107, 24, 2011, 247801-Download Item:
Sequence of Four Orthogonal Smectic Phases in an Achiral Bent-Core Liquid Crystal- Evidence for the SmAP? Phase.pdf (Published (publisher's copy) - Peer Reviewed) 523.0Kb
Abstract:
The mesomorphic properties of an achiral bent-core liquid crystal derived from 4-cyanoresorcinol are studied by polarizing optical microscopy, x-ray diffraction, and second harmonic electro-optic response. It shows a novel sequence of four nontilted or orthogonal smectic phases on cooling: SmA-SmAP(R)-SmAP(X)-SmAP(A). Here SmAP(X) is the new orthogonal polar uniaxial smectic phase. The electric-field-induced transformations in the SmAP(X) phase give rise to two biaxial states separated by a uniaxial one. The second harmonic electro-optic response in this phase is interpreted in terms of the polar interaction with the electric field. A comparison of the experimental results with the next-nearest-neighbor model for the structure of the SmAP(X) phase shows it to be an SmAP(alpha) phase.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
SFI RFP 06/RFP/ENE039
European Commission
216025
European Commission
06/RFP/ENE039
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http://people.tcd.ie/jvijhttp://people.tcd.ie/ypanarin
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Author: Vij, Jagdish; Panarin, Yuri
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Journal ArticleSeries/Report no:
Physical Review Letters107
24
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Particles and fields physicsSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1103/PhysRevLett.107.247801Licences: