How unconventional oxidation state Au${}^{2+}$ is stabilized in halide perovskite Cs${}_4$Au${}_3$Cl${}_{12}$: a first-principles study of its polaron crystal nature

Kazuki Morita, Andrew M. Rappe

Gold in crystalline compounds is typically only stable in oxidation states Au1+ and Au3+. Even compounds with nominal Au2+ usually disproportionate into Au1+ and Au3+. Recently, Cs…