Figure 2
From: Sub-lattice of Jahn-Teller centers in hexaferrite crystal
Adiabatic potential energy surface of a tetrahedral Jahn-Teller complex corresponding to the \(E\otimes e\) JTE problem: (a) without accounting for the vibronic interaction, (b) with account of vibronic Hamiltonian taken in linear approximation over \(({Q}_{2},{Q}_{3})\), and (c) with account of vibronic Hamiltonian in quadratic approximation. In (a), the zero potential energy relates to the minimum of \(E({Q}_{2},{Q}_{3})\), while the zero energy shown in panels (b,c) relates to the conical intersection; i.e., account of the vibronic interaction lowers the values of potential energy minima.
