2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107123We review the basic theoretical background for working out a variational band solution for vibronic polarons in crystals. It is based on the Lee-Low-Pines proposal as extended by Thomas et al. for describing Jahn-Teller polarons along a linear chain of atoms. The variational properties of antiadiabatic itinerant polarons are also discussed.8 pages and 1 figure pdf formatSuperconductivityMaterials Sciencetext