Origin and mechanisms emerging glass-like properties in local-symmetry broken materials

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This 4 years research project aims to theoretically elucidate the origin and mechanisms of glass-like behaviors observed for local-symmetry broken materials. In the first 2 years, we investigated the microscopic origin emerging glass-like properties in these materials. We introduced long-range interactions between symmetry-broken ions in addition to local anharmonic potential. The importance of these interactions to explain glass-like behaviors became clear. In the latter 2 years, we calculated phonon dispersion relations in the THz frequency range for local symmetry broken materials. It became possible to compare it with the experimental results in terms of coherent inelastic neutron scattering for local-symmetry broken materials .