論文

査読有り
1992年

Visual observation of dispirations in liquid crystals

Physical Review B
  • Yoichi Takanishi
  • ,
  • Hideo Takezoe
  • ,
  • Atsuo Fukuda
  • ,
  • Junji Watanabe

45
14
開始ページ
7684
終了ページ
7689
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.45.7684

In this work, wedge-screw and twist-edge dispirations in liquid crystals were visually observed. In smectic phases, such as the antiferroelectric SmCA and the dimeric SmC2, where the molecules or the mesogenic groups in the adjacent smectic layers tilt in opposite senses, we found the schlieren texture with the strength of m=±1/2 which should not be seen in the normal SmC phase. The observation indicates the existence of a wedge-screw dispiration
i.e., a -wedge disclination (m=1/2) accompanied by a screw dislocation that is characterized by the Burgers vector b whose magnitude is equal to the layer thickness d. A threadlike defect line with ±-wedge disclinations at the ends observed in freely suspended films manifests a twist-edge dispiration
i.e., a linked structure of a -twist disclination and a b=d edge dislocation. © 1992 The American Physical Society.

リンク情報
DOI
https://doi.org/10.1103/PhysRevB.45.7684
ID情報
  • DOI : 10.1103/PhysRevB.45.7684
  • ISSN : 0163-1829
  • SCOPUS ID : 0000961543

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