Anharmonicity of the antiferrodistortive soft mode in barium zirconate BaZrO${}_3$

Petter Rosander, Erik Fransson, Cosme Milesi-Brault +6

Barium zirconate (BaZrO${}_3$) is one of the very few perovskites that is claimed to retain an average cubic structure down to \SI{0}{\K}, while being energetically very close to an…