Energy surface and minimum energy paths for Freedericksz transitions in bistable cholesteric liquid crystals

A. V. Ivanov, P. F. Bessarab, E. V. Aksenova, V. P. Romanov, V. M. Uzdin

Результат исследований: Научные публикации в периодических изданияхстатья

2 Цитирования (Scopus)

Аннотация

The multidimensional energy surface of a cholesteric liquid crystal in a planar cell is investigated as a function of spherical coordinates determining the director orientation. Minima on the energy surface correspond to the stable states with particular director distribution. External electric and magnetic fields deform the energy surface and positions of minima. It can lead to the transitions between states, known as the Freedericksz effect. Transitions can be continuous or discontinuous depending on parameters of the liquid crystal which determine an energy surface. In a case of discontinuous transition when a barrier between stable states is comparable with the thermal energy, the activation transitions may occur, and it leads to the modification of characteristics of the Freedericksz effect with temperature without explicit temperature dependencies of liquid crystal parameters. A minimum energy path between stable states on the energy surface for the Freedericksz transition is found using the geodesic nu
Язык оригиналаанглийский
Страницы (с-по)042708 (8 pages)
ЖурналPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Том93
Номер выпуска4
DOI
СостояниеОпубликовано - 2016

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