Lattice anharmonicity effects in fluorite oxide single crystals and anomalous increase in phonon lifetime in ceria at elevated temperature

Amey Khanolkar, Saqeeb Adnan, Md Minaruzzaman +6

We investigate the temperature dependence of the frequency and linewidth of the triply-degenerate T${}_{2g}$ zone-centered optical phonon in flux-grown ceria and hydrothermally-synth…