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Superconductivity of Non-Strained PbTe-PbS and Strained PbTe-SnTe Superlattices

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Mironov O., Chistyakov S., Fedorenko A., Shpakovskaya L., Sipatov A., Savitskii B., Nashchekina O., Oszwałdowski M.
Acta Physica Polonica A
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1991
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vol. 80
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issue 3
329-332
EN
A comparative study of structural and superconductive properties of semi conductor epitaxial superlattices PbTe-SnTe and PbTe-PbS grown on (001) KCl has been carried out. It has been found that the superconductivity of the PbTe-SnTe superlattices is caused by the stretching strain in the SnTe layers and it may be connected with the relative positions of L^{+}_{8} and L^{+}_{6} terms of PbTe and SnTe, respectively in the heterojunction. In contrast to the PbTe-SnTe superlattices, the superconductivity of the PbTe-PbS super lattices is found to be associated with regular misfit dislocation grids which are generated at the interfaces.
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Time Dependent Tunneling in Double-Barrier ZnSe/ZnTe Structures

100%
Bała P., Kwiatkowski J., Bała W.
Acta Physica Polonica A
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1992
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vol. 82
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issue 4
649-652
EN
The wave-packet time dependent quantum mechanics is used to calculate tunneling probability through a double-barrier ZnSe/ZnTe structure. The time dependent I-V characteristics are obtained for several structures. The resonant peaks are observed and their changes with the barrier parameters are monitored.
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Point-Contact I-V Characteristics of the Electroluminescent ZnS:Mn,Cu Thin Films Studied by STM

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Szuba S., Czajka R., Gordon W., Polewska W., Raułuszkiewicz J., Reich A.
Acta Physica Polonica A
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1991
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vol. 79
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issue 2-3
171-174
EN
STM images of ZnS:Mn,Cu thin films and spatially resolved current-voltage characteristics are shown. The results make possible to estimate the morphology and conductivity distribution with nanometer resolution.
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