A BOUND POLARON IN A QUASI-2-DIMENSIONAL STRUCTURE OF STRONG-COUPLINGPOLAR CRYSTALS

The binding energy of a bound polaron in a quasi-two-dimensional stron g coupling polar material has been researched by employing a two-param eter trial wave function in the Landau-Pekar variational theory. The b inding energy was obtained as a function of the width of the material as well as the position of the Coulomb impurity. It decreases quickly and approaches that of the three-dimensional structure when the well w idth increases. A discussion on the dimensional properties of the mate rials has also been given based on the electron wave function. (C) 199 8 Elsevier Science B.V, All rights reserved.