Semimetallic conductivity was observed in PbTe/PbS SŁ obtained by a "hot wall" technique on (001) KCl substrates with (001) PbTe buffer layers.From the analysis of RH(H) and p┴(H) dependencies by the Monte-Carlo fitting procedure the band offset DE" = 0.32 ± 0.05 eV was obtained (T = 77 K) and it was proved that these SŁs are type II "misaligned" structures.The calculations of the band structure of PbTe/PbS SLs showed that in such SLs a semimetal-semiconductor transition should occur for layer thicknesses of about 60=70 A.
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Сизов et al. (1995) studied this question.
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