Electron self-trapping in two band system
Klinger M.I., Taraskin S.N.
Strong electron self-trapping with energy gain close to the magnitude of interband ( or mobility ) gap width is investigated. Interactions between the "self-trapping" state and the "non-parent" band states are taken into account. It gives rise to the change of occupation of self-t.apping state from initial single or zero up to almost double resulting in effective increase of electron-atomic interaction. This effect restricts the value of pair self-trapping correlation energy.