Rotational symmetry breaking of nuclear motion in the Jahn-Teller X3 molecule du

Phys. Rev. B 108, 115429 (2023)
https://doi.org/10.1103/PhysRevB.108.115429
 
The Casimir-Polder interaction between the Jahn-Teller X3 molecule with the linear E ⊗ e problem and a gyrotropic medium is considered. Due to the interaction, the molecule plane is reoriented perpendicularly to the interface surface to lift degeneracy of circular motion of molecule nuclei. A direct consequence of the broken rotational symmetry is the appearance of the orbital magnetic moment and accumulation of the topological Berry phase.