Soliton states in a chain with two atoms per elementary cell

The autolocalization of carriers in a chain with two atoms per elementary cell is investigated. It is shown that in the case of big differences of neighbouring atom masses the hole in the valence band corresponds to a soliton and the electron in the conduction band is in a delocalized state, if the atom with bigger mass has the higher energetic term. In the opposite case a soliton can be formed by an electron in the conduction band. The bisoliton mechanism of superconductivity is provided by hole carriers in the first case, and electron carriers in the last one. [Russian Text Ignored].