Vibronic interaction in crystals with the Jahn-Teller centers in the elementary energy bands concept

D. M. Bercha, S. A. Bercha, K. E. Glukhov +1

The order-disorder type phase transition caused by the vibronic interaction (collective Jahn-Teller effect) in a monoclinic CuInP${}_2$S${}_6$ crystal is analyzed. For this purpose, a…