Energetics of screw dislocations in smectic A liquid crystals
- 1 February 1988
- journal article
- research article
- Published by Taylor & Francis in Liquid Crystals
- Vol. 3 (2) , 249-258
- https://doi.org/10.1080/02678298808086371
Abstract
We derive the self-energy of a single screw dislocation in smectic A liquid crystals allowing for bend curvature in the bulk. For the core region two models are investigated: a nematic one including bend and twist curvature and an isotropic one including surface curvature energy. The former is energetically favourable. For both models the interaction force between two parallel screw dislocations is zero within the linear theory. Taking into account non-linearities perturbatively, an interaction potential is obtained, which is proportional to the logarithm of the distance of the screw dislocations.Keywords
This publication has 6 references indexed in Scilit:
- Dynamics of a screw dislocation in smectic A liquid crystalsPhilosophical Magazine A, 1986
- Point-like impurity-dislocation interactions in smectic A liquid crystalsLiquid Crystals, 1986
- Structure of the core of a screw dislocation in smectic A liquid crystalsLiquid Crystals, 1986
- On static helical instabilities of screw dislocations in a SmA phase and on their consequence on plasticityJournal de Physique, 1981
- Screw dislocations in the smectic C phase of liquid crystalsPhilosophical Magazine A, 1980
- On the Elastic Theory of Uniaxial Liquid CrystalsThe Journal of Chemical Physics, 1971