Criticality of an isotropic-to-smectic transition induced by anisotropic quenched disorder
| Autor: | Patrick Huber, Andriy V. Kityk, Ronan Lefort, Gilbert Chahine, Mohammed Guendouz, Klaus Knorr, Denis Morineau |
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| Přispěvatelé: | Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Institute of Computer and Information Sciences (ICIS), University of Czestochowa, Faculty of Physics and Mechatronics Engineering, Saarland University [Saarbrücken], Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne, P.H. acknowledges financial support by the DFG priorityprogram 1164, Nano- and Microfluidics, Grant No. 850/2., Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2010 |
| Předmět: |
Phase transition
Materials science Silicon FOS: Physical sciences chemistry.chemical_element Chemical Condensed Matter - Soft Condensed Matter Neutron scattering 01 natural sciences Phase Transition 010305 fluids & plasmas Models Liquid crystal Phase (matter) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Computer Simulation 010306 general physics Anisotropy 61.30.Eb 64.70.Nd [PHYS]Physics [physics] Birefringence Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Liquid Crystals/chemistry Isotropy Liquid Crystals Condensed Matter::Soft Condensed Matter Models Chemical chemistry Soft Condensed Matter (cond-mat.soft) |
| Zdroj: | Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2010, 81 (3 Pt 1), pp.031703. ⟨10.1103/PhysRevE.81.031703⟩ Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2010, 81 (3 Pt 1), pp.031703. ⟨10.1103/PhysRevE.81.031703⟩ |
| ISSN: | 1550-2376 1539-3755 |
| Popis: | International audience; We report combined optical birefringence and neutron scattering measurements on the liquid crystal 12CB nanoconfined in mesoporous silicon layers. This liquid crystal exhibits strong nematic-smectic coupling responsible for a discontinuous isotropic-to-smectic phase transition in the bulk state. Confined in porous silicon, 12CB is subjected to strong anisotropic quenched disorder: a short-ranged smectic state evolves out of a paranematic phase. This transformation appears continuous, losing its bulk first-order character. This contrasts with previously reported observations on liquid crystals under isotropic quenched disorder. In the low temperature phase, both orientational and translational order parameters obey the same power law. |
| Databáze: | OpenAIRE |
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