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Topological Ferroelectric Bistability in a Polarization-Modulated Orthogonal Smectic Liquid Crystal

C. H. Zhu ; R. F. Shao ; R. A. Reddy ; D. Chen ; Y. Q. Shen ; T. Gong ; M. A. Glaser ; E. Korblova ; Per Rudquist (Institutionen för mikroteknologi och nanovetenskap, Bionanosystem) ; J. E. Maclennan ; D. M. Walba ; N. A. Clark
Journal of the American Chemical Society (0002-7863). Vol. 134 (2012), 23, p. 9681-9687.
[Artikel, refereegranskad vetenskaplig]

We report a bent-core liquid crystal (LC) compound exhibiting two fluid smectic phases in which two-dimensional, polar, orthorhombic layers order into three-dimensional ferroelectric states. The lower-temperature phase has a uniform polarization field which responds in an analog fashion to applied electric field. The higher-temperature phase is a new smectic state with periodic undulation of the polarization, structurally modulated layers, and a bistable response to applied electric field which originates in the periodically splay-modulated bulk of the LC rather than by surface stabilization at the cell boundaries.

Nyckelord: achiral molecules, phase, order, transition



Denna post skapades 2012-09-04. Senast ändrad 2016-07-25.
CPL Pubid: 162866

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Bionanosystem (2007-2015)

Ämnesområden

Kemi

Chalmers infrastruktur