Interface phonons and polaron effect in II-VI quantum wells

The theory of large radius polaron in II-VI quantum wells is developed. The analytic expressions for polaron binding energy are obtained for the electron, the hole and the exciton polarons. The numerical results obtained show that the strong electron-phonon interaction conditions can be realized in the quantum wells based on a number of II-VI compounds. The influence of the interface optical phonons on the polaron states is accounted for. The extent of interface phonon influence depends on the properties both of the quantum well and of the barrier materials. It is shown that the interaction of charge particles with the interface phonons can lead to the enhancement as well as to the reduction of the polaron effects. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim