LaVO${}_3$: a true Kugel-Khomskii system

Xue-Jing Zhang, Erik Koch, Eva Pavarini

We show that the $t_{2g}^2$ perovskite LaVO${}_3$, in its orthorhombic phase, is a rare case of a system hosting an orbital-ordering Kugel-Khomskii phase transition, rather than bein…