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

研究成果: Article査読

55 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
外部発表はい

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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