Video URL

https://pirsa.org/12060072

Pyrochlore Material Yb_2Ti_2O_7: A Model Quantum Spin Ice

(2012). Pyrochlore Material Yb_2Ti_2O_7: A Model Quantum Spin Ice. Perimeter Institute for Theoretical Physics. https://pirsa.org/12060072

Pyrochlore Material Yb_2Ti_2O_7: A Model Quantum Spin Ice. Perimeter Institute for Theoretical Physics, Jun. 15, 2012, https://pirsa.org/12060072 

          @misc{ scivideos_PIRSA:12060072,
            doi = {10.48660/12060072},
            url = {https://pirsa.org/12060072},
            author = {},
            keywords = {Quantum Matter},
            language = {en},
            title = {Pyrochlore Material Yb_2Ti_2O_7: A Model Quantum Spin Ice},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2012},
            month = {jun},
            note = {PIRSA:12060072 see, \url{https://scivideos.org/pirsa/12060072}}
          }
DOI 10.48660/12060072
Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

We discuss the thermodynamic properties of the model exchange quantum spin ice material Yb_2Ti_2O_7. Using exchange parameters recently determined from high-field neutron scattering measurements, we calculate the thermodynamic properties of this model system. We find very good agreement with the heat capacity, entropy and magnetization measurements on the materials. We show that, in the weak quantum regime, quantum fluctuations lead to the selection, within the spin-ice manifold, of a conventional ordered ground state. However, the excitations above the ground state and their dynamics remain highly non-trivial. They consist of weakly bound spinon-antispinon pairs separated by long strings. We present several pieces of indirect evidence that the low temperature phase transition observed in these materials is to this conventional ordered state.