Temperature dependence of exciton peak energies in multiple quantum wells

The temperature dependence of the exciton peak energies as observed in short-period superlattice CdTe/ZnTe multiple quantum well (MQW) structures by Yoshimura et al. [Jpn. J. Appl. Phys., Part 1 34, 1459 (1995)] is fitted by an analytical four-parameter model developed recently by the author. Due to the dominance of short-wavelength phonons, the degree of concavity (superlinearity) of the MQW-specific electron-phonon spectral function is much more pronounced than in bulk samples of the constituent binary materials CdTe and ZnTe. We give an expression for the temperature dependence of exciton peak energies which is well suited particularly for analytical descriptions of the effective gap shrinkage phenomenon in narrow-well and short-period superlattice MQW structures.