Cooperative Jahn‐Teller Effect in Layered Crystals

Abstract

Sciences of the Ukrainian SSR, Chernovtsy Cooperative Jahn-Teller Effect in Layered Crystals 1) BY B.A. LUKIYAIWTSThe presence of several sublayers in the unit cell of a layered crystal and weak interlayer mixing in it is the reason for the existence of Davydov bands. The Jahn-Teller pseudoeffect in layered crystals characterized by Davydov-split bands /1/ has been discussed recently /2/. The question arises about the role played by the carrier dispersion in the Jahn-Teller pseudoeffect. This leads to the formulation of the problem of the cooperative Jahn-Teller effect in layered