We consider a simple bipolaron approach to description of anisotropic crystals in the strongcoupling limit. We have taken into account anisotropy of effective band masses and dielectric constants of crystals. The calculations ...

The work is devoted to issues related with implementation of the virial theorem for one-center bipolaron. The virial theorem expressions have been obtained for an electron system with Coulomb interactions in the phonon ...

The theoretical consideration of the energy of the lowest singlet and triplet terms of shallow D¯-centers (two electrons, bound with one-charge Coulomb center) in semiconductors with an ionic and covalent binding has been ...