Bose-Einstein Condensation of Excitons in Planar Systems and Superconductive Phase Transition Temperature.

A theoretical model is developed for treating superconductive Bose-Einstein condensation (BEC) effects for excitons in planar systems, under the condition that many excitons are included in a surface area, with the dimensions of the exciton center of mass de Broglie (dB) wavelength, and under the condition that attractive forces are introduced between different excitons. The total internal energy of the excitonic system is found to be composed of the separate exciton-positive energies and negative energy due to scattering between different excitons. We assume that for high density of excitons, and corresponding attractive interactions, excitons in internal mode k are annihilated and in the same time excitons in internal mode k are created, where these scattering effects are integrated for all k and k values. It is assumed that the internal momenta of the excited excitons remain in a quasi-stationary state, with approximately Bose distribution. Self-consistent equations for BEC of electron-hole pairs and corresponding phase transition temperature are developed as a function of electromagnetic interactions, experimental conditions, and parameters. Possible applications by the use of the present theory are described. [ABSTRACT FROM AUTHOR]