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

Regis Guegan, Denis Morineau, Claude Loverdo, Wilfried Béziel, Mohammed Guendouz

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number011707
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume73
Issue number1
DOIs
Publication statusPublished - 2006 Jan 1
Externally publishedYes

Fingerprint

Porous Silicon
Quenched Disorder
silicon films
porous silicon
Liquid Crystal
Porous Materials
liquid crystals
disorders
porous materials
Nanopore
Neutron Scattering
Range of data
Random Field
Dimensionality
neutron scattering
porosity
Evidence
temperature
Observation

ASJC Scopus subject areas

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

Cite this

Evidence of anisotropic quenched disorder effects on a smectic liquid crystal confined in porous silicon. / Guegan, Regis; Morineau, Denis; Loverdo, Claude; Béziel, Wilfried; Guendouz, Mohammed.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 73, No. 1, 011707, 01.01.2006.

Research output: Contribution to journalArticle

@article{3ee85677ef5445188e69ab0117659a1d,
title = "Evidence of anisotropic quenched disorder effects on a smectic liquid crystal confined in porous silicon",
abstract = "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.",
author = "Regis Guegan and Denis Morineau and Claude Loverdo and Wilfried B{\'e}ziel and Mohammed Guendouz",
year = "2006",
month = "1",
day = "1",
doi = "10.1103/PhysRevE.73.011707",
language = "English",
volume = "73",
journal = "Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics",
issn = "1063-651X",
publisher = "American Physical Society",
number = "1",

}

TY - JOUR

T1 - Evidence of anisotropic quenched disorder effects on a smectic liquid crystal confined in porous silicon

AU - Guegan, Regis

AU - Morineau, Denis

AU - Loverdo, Claude

AU - Béziel, Wilfried

AU - Guendouz, Mohammed

PY - 2006/1/1

Y1 - 2006/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=32844466267&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=32844466267&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.73.011707

DO - 10.1103/PhysRevE.73.011707

M3 - Article

AN - SCOPUS:32844466267

VL - 73

JO - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

JF - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

SN - 1063-651X

IS - 1

M1 - 011707

ER -