Topological Ferroelectric Bistability in a Polarization-Modulated Orthogonal Smectic Liquid Crystal
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- 作者：Chenhui Zhu ; Renfan Shao ; R. Amaranatha Reddy ; Dong Chen ; Yongqiang Shen ; Tao Gong ; Matthew A. Glaser ; Eva Korblova ; Per Rudquist ; Joseph E. Maclennan ; David M. Walba ; Noel A. Clark
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：June 13, 2012
- 年：2012
- 卷：134
- 期：23
- 页码：9681-9687
- 全文大小：484K
- 年卷期：v.134,no.23(June 13, 2012)
- ISSN：1520-5126
文摘
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.