Q-tensor model of twist-bend and splay nematic phases
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About this item
| Description: |
Copic, M
Tuesday 14th May 2019 - 16:00 to 16:40 |
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| Created: | 2019-05-15 16:07 |
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| Collection: | The mathematical design of new materials |
| Publisher: | Isaac Newton Institute |
| Copyright: | Copic, M |
| Language: | eng (English) |
| Distribution: |
World
(downloadable)
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| Explicit content: | No |
| Aspect Ratio: | 16:9 |
| Screencast: | No |
| Bumper: | UCS Default |
| Trailer: | UCS Default |
| 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.
Martin Čopič and Alenka Mertelj - Insitute J. Stephan, Ljubljana, Slovenia |
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