PIRSA:13120033

Video URL

https://pirsa.org/13120033

Topological defects of tetratic liquid-crystal order on a soft spherical surface

Li, Y. (2013). Topological defects of tetratic liquid-crystal order on a soft spherical surface. Perimeter Institute for Theoretical Physics. https://pirsa.org/13120033

Li, Yao. Topological defects of tetratic liquid-crystal order on a soft spherical surface. Perimeter Institute for Theoretical Physics, Dec. 05, 2013, https://pirsa.org/13120033 

          @misc{ scivideos_PIRSA:13120033,
            doi = {10.48660/13120033},
            url = {https://pirsa.org/13120033},
            author = {Li, Yao},
            keywords = {},
            language = {en},
            title = {Topological defects of tetratic liquid-crystal order on a soft spherical surface},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2013},
            month = {dec},
            note = {PIRSA:13120033 see, \url{https://scivideos.org/pirsa/13120033}}
          }

Yao Li Tsinghua University

Talk numberPIRSA:13120033
DOI10.48660/13120033
Source RepositoryPIRSA
Collection
Talk Type Conference

Abstract

We model the orientational and positional order of tetratically shaped molecules each having four-fold structural symmetryconfined on a spherical surface. Our Monte Carlo simulation shows that at a high molecular density a tetratic orientational orderdevelops in the system accompanied by eight disclinations arranged in an anticube form on the hard spherical surface. We alsoconsider an elastic-energy model which consists of both Helfrich and Frank energies for a soft surface; the solution confirms theMonte Carlo study and further predicts the tetratic morphology that can be realized on the surface of a soft vesicle. Assumingthat the induced interaction between these disclinations are repulsive we demonstrate that the anticube structure has a lower freeenergy than for example the cubic structure.