The Anti-Jahn-Teller Polaron in LaMnO${}_3$

Philip B. Allen, Vasili Perebeinos

Distortions of the oxygen sublattice couple to $e_g$ orbitals of Mn${}^{3+}$ and drive a cooperative Jahn-Teller (orbital ordering) transition in LaMnO${}_3$. A simple model for this t…