PIRSA:13050025

Emergent Fermionic Strings in Bosonic He4 Crystal

Baskaran, G. (2013). Emergent Fermionic Strings in Bosonic He4 Crystal. Perimeter Institute. https://pirsa.org/13050025

Baskaran, Ganapathy. Emergent Fermionic Strings in Bosonic He4 Crystal. Perimeter Institute, May. 06, 2013, https://pirsa.org/13050025 

          @misc{ pirsa_PIRSA:13050025,
            doi = {10.48660/13050025},
            url = {https://pirsa.org/13050025},
            author = {Baskaran, Ganapathy},
            keywords = {Condensed Matter},
            language = {en},
            title = {Emergent Fermionic Strings in Bosonic He4 Crystal},
            publisher = {Perimeter Institute},
            year = {2013},
            month = {may},
            note = {PIRSA:13050025 see, \url{https://pirsa.org}}
          }

Baskaran Ganapathy Institute of Mathematical Sciences

DOI 10.48660/13050025
Collection
Talk Type Conference
Subject

Abstract

Large zero point motion of light atoms in solid Helium 4 leads to several anomalous properties, including a supersolid type behavior. We suggest an `anisotropic quantum melted' atom density wave model for solid He4 with hcp symmetry. Here, atoms preferentially quantum melt along the c-axis and maintain self organized crystallinity and confined dynamics along ab-plane. This leads to profound consequences: i) statistics transmutation of He4 atoms into fermions for c-axis dynamics, arising from restricted one dimensional motion and hard core repulsion, ii) resulting `fermionic strings' undergo Peierls instability (an atom density wave formation) in a staggered fashion and help regain the original hcp crystal symmetry, iii) `particle-hole' type excitations iv) emergence of `confined' `half atom' domain wall excitations, and so on. Known anomalies of solid He4 gets a natural qualitative explanation in the present scenario.