Evidence of anisotropic quenched disorder effects on a smectic liquid crystal confined in porous silicon

Régis Guégan*, Denis Morineau, Claude Loverdo, Wilfried Béziel, Mohammed Guendouz

*この研究の対応する著者

研究成果: Article査読

63 被引用数 (Scopus)

抄録

We present a neutron scattering analysis of the structure of the smectic liquid crystal octylcyanobiphenyl (8CB) confined in one-dimensional nanopores of porous silicon films (PS). The smectic transition is completely suppressed, leading to the extension of a short-range ordered smectic phase aligned along the pore axis. It evolves reversibly over an extended temperature range, down to 50 K below the N-SmA transition in pure 8CB. This behavior strongly differs from previous observations of smectics in different one-dimensional porous materials. A coherent picture of this striking behavior requires that quenched disorder effects are invoked. The strongly disordered nature of the inner surface of PS acts as random fields coupling to the smectic order. The one-dimensionality of PS nanochannels offers perspectives on quenched disorder effects, of which observation has been restricted to homogeneous random porous materials so far.

本文言語English
論文番号011707
ジャーナルPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
73
1
DOI
出版ステータスPublished - 2006 1月
外部発表はい

ASJC Scopus subject areas

  • 統計物理学および非線形物理学
  • 統計学および確率
  • 凝縮系物理学

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