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Martin Copic (Univerza v Ljubljani; Jozef Stefan Institute)
Tuesday 14 May 2019, 16:00-16:40
Q-tensor model of twist-bend and splay nematic phases
- 👤 Speaker: Martin Copic (Univerza v Ljubljani; Jozef Stefan Institute)
- 📅 Date & Time: Tuesday 14 May 2019, 16:00 - 16:40
- 📍 Venue: Seminar Room 1, Newton Institute
Abstract
The twist-bend nematic phase is characterized by a conically twisting director and by a dramatic softening of the bend elastic constant. The instability towards bend can theoretically also induce a splay bend phase with a bend-splay modulation along the director. Recently we found another modulated nematic phase where the splay elastic constant tends to zero, resulting in a splay modulation perpendicular to the director. These phases can be modeled by a single Q-tensor free energy with a term that breaks the degeneracy between the splay and bend elastic constant and with a flexoelectric coupling of the divergence of the Q-tensor with polarization. Insitute J. Stephan, Ljubljana, Slovenia
Martin Čopič and Alenka Mertelj
Series This talk is part of the Isaac Newton Institute Seminar Series series.
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