Experimental evidence for field induced emergent clock anisotropies in the XY pyrochlore Er2Ti2O7

          @misc{ scivideos_PIRSA:17050091,
            doi = {10.48660/17050091},
            url = {https://pirsa.org/17050091},
            author = {Gaudet, Jonathan},
            keywords = {Quantum Matter},
            language = {en},
            title = {Experimental evidence for field induced emergent clock anisotropies in the XY pyrochlore Er2Ti2O7},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {may},
            note = {PIRSA:17050091 see, \url{https://scivideos.org/pirsa/17050091}}
          }
          

Abstract

The XY pyrochlore Er2Ti2O7 has garnered much attention due to the possibility that its ground state selection could originate from an order-by-disorder mechanism [1,2]. However, recently, theoretical work has exploited the fact that the symmetry breaking in this system is a rare case of high discrete symmetry (Z6) [3]. This work studied the effect of a magnetic field on the Z6 symmetry breaking and predicted rich and controllable magnetothermodynamic properties. Indeed, the authors predict numerous domains transitions in the low field regime that strongly depends on the field direction. In this talk, I will present neutron scattering data on Er2Ti2O7 with a magnetic field applied along different high symmetry directions which provides the first experimental evidence for this rich Z6 domain phase behavior [4].