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SUMMARY:Exotic ordered structures of a thin film of a chiral liquid crysta
 l - Jun-ichi Fukuda (Kyushu University)
DTSTART:20190403T141000Z
DTEND:20190403T145000Z
UID:TALK122539@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:&nbsp\;  <span>Liquid crystals fascinated scientists because t
 hey exhibit ordered structures in diverse length scales. Here we focus on 
 structures formed in a thin film of a chiral liquid crystal that allows sp
 ontaneous local twist of orientational order. By numerical calculations ba
 sed on a continuum theory describing the orientational order by a second-r
 ank tensor\, we show that a thin film of a chiral liquid crystal exhibit a
  variety of exotic mesoscale structures depending on temperature\, film th
 ickness and surface anchoring that dictates the orientational order at the
  film surfaces [1\,2]. These structures are understood as a result of frus
 trations between the bulk ordering and the surface anchoring\, and include
  a hexagonal lattice of Skyrmions\, vortex-like topological entities that 
 have been shown to emerge in various condensed matter systems. We also bri
 efly mention the optical properties of these structures [2\,3].<span><br> 
 <br> [1] J. Fukuda and S. &#x17D\;umer\, Phys. Rev. Lett. 104\, 017801 (20
 10)\; Phys.&nbsp\;<br> Rev. Lett. 106\, 097801 (2011)\; Nature Commun. 2\,
  246 (2011).<br> <br> [2] A. Nych\, J. Fukuda\, et al.\, Nature Phys. 13\,
  1215 (2017).</span></span>  <span><span><br> [3] J. Fukuda et al.\, Sci. 
 </span>Rep. 8\, 17234 (2018).</span>  <br><br><br><br><br><br>
LOCATION:Seminar Room 2\, Newton Institute
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