Phys. Rev. Lett. 97, 147801 (2006) [4 pages]Orientational Coupling Amplification in Ferroelectric Nematic ColloidsSee Also: Erratum Received 15 March 2006; published 5 October 2006 We investigated the physical properties of low concentration ferroelectric nematic colloids, using calorimetry, optical methods, infrared spectroscopy, and capacitance studies. The resulting homogeneous colloids possess a significantly amplified nematic orientational coupling. We find that the nematic orientation coupling increases by ∼10% for particle concentrations of 0.2%. A manifestation of the increased orientational order is that the clearing temperature of a nematic colloid increases by up to 40 °C compared to the pure liquid crystal host. A theoretical model is proposed in which the ferroelectric particles induce local dipoles whose effective interaction is proportional to the square of the orientational order parameter. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.147801
DOI:
10.1103/PhysRevLett.97.147801
PACS:
64.70.Md, 77.84.−s, 82.70.Dd
See AlsoErratum: Fenghua Li, Oleksandr Buchnev, Chae Il Cheon, Anatoliy Glushchenko, Victor Reshetnyak, Yuri Reznikov, Timothy J. Sluckin, and John L. West, Erratum: Orientational Coupling Amplification in Ferroelectric Nematic Colloids [Phys. Rev. Lett. 97, 147801 (2006)], Phys. Rev. Lett. 99, 219901 (2007). |
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