Dynamics of a pair of electron and hole in semiconductor superlattice under an intense electric field

This paper investigates the behavior of a pair of electron and holein semiconductor superlattice under an external electric field withthe consideration of Coulomb interaction. By numerically calculatingthe corresponding probability in the nearest neighbor tight bindingapproximation, we find that the single electron (or the hole) cannot be dynamically localized due to the Coulomb interaction, whilethe dynamic localization of exciton (the pair of the electron andhole) still exists. Moreover we find that with the increase of theintensity of electric field, the exciton can be dynamicallylocalized more completely.