skip to content

Q-tensor model of twist-bend and splay nematic phases

Presented by: 
Martin Copic Univerza v Ljubljani, Jozef Stefan Institute
Tuesday 14th May 2019 - 16:00 to 16:40
INI Seminar Room 1
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
The video for this talk should appear here if JavaScript is enabled.
If it doesn't, something may have gone wrong with our embedded player.
We'll get it fixed as soon as possible.
University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons