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The helicoidal modulated nematic phases in a model system of V-shaped moleculesстатья
- Авторы: Aliev M.A., Ugolkova E.A., Kuzminyh N.Y.
- Журнал: International Journal of Modern Physics B
- Том: 33
- Номер: 10
- Год издания: 2019
- Издательство: World Scientific Publishing Co
- Местоположение издательства: Singapore
- DOI: 10.1142/S0217979219500796
- Аннотация: The phase behavior of the melt of the symmetric V-shaped molecules has been inspected within the Landau-de Gennes approach. The arms of V-shaped molecule are modeled by rod-like segments connected at an external angle α; these segments are assumed to be composed of monomer units. The phase diagram of the system contains regions of stability of the isotropic, homogeneous nematic, and modulated nematic phases: Nematic twist bend (NTB) phase that is characterized by the three directors which move on a helix and one of these directors forms a fixed nonzero cone angle with the helix axis, and the N 0 modulated phase in which one director is parallel to the helix axis while two others are orthogonal to the helix axis. The characteristic periods of modulated structures were found to be of order a few molecular lengths.
- Добавил в систему: Кузьминых Николай Юрьевич