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SUMMARY:Q-tensor model of twist-bend and splay nematic phases - Martin Cop
 ic (Univerza v Ljubljani\; Jozef Stefan Institute)
DTSTART:20190514T150000Z
DTEND:20190514T154000Z
UID:TALK124411@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:<span>The twist-bend nematic phase is characterized by a conic
 ally twisting director and by a dramatic softening of the bend elastic con
 stant. The instability towards bend can theoretically also induce a splay 
 -bend phase with a bend-splay modulation along the director. Recently we f
 ound another modulated nematic phase&nbsp\; where the splay elastic consta
 nt tends to zero\, resulting in a splay modulation perpendicular to the di
 rector. These phases can be modeled by a single Q-tensor free energy with 
 a&nbsp\; term that breaks the degeneracy between the splay and bend elasti
 c constant and with a flexoelectric coupling of the divergence of the Q-te
 nsor with polarization.&nbsp\; <br><br></span>Martin &#x10C\;opi&#x10D\; a
 nd Alenka Mertelj&nbsp\;- Insitute J. Stephan\, Ljubljana\, Slovenia
LOCATION:Seminar Room 1\, Newton Institute
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