PbTe-Pb1−xSnxTe superlattices prepared by a hot wall technique

The PbTe-Pb0.8Sn0.2Te superlattices were made by the hot wall technique on BaF2 substrates. Two superlattices with the period thickness of 100 and 200 Å were analyzed by sputtering-Auger electron spectroscopy and good results were obtained. The interdiffusions of Pb and Sn across the junction were also investigated and the diffusion coefficients of Pb and Sn at 300 °C were found to be 1.8 and 2.9×10−17 cm2/sec, respectively.