Superconductivity of Non-Strained PbTe-PbS and Strained PbTe-SnTe Superlattices |
| O.A. Mironov, S.V. Chistyakov Institute of Radiophysics and Electronics, Academy of Sciences of Ukranian SSR, Acad. Proscura st. 12, 310085 Kharkov, USSR A.I. Fedorenko, L.P. Shpakovskaya, A.Yu. Sipatov, B.A. Savitskii, O.N. Nashchekina Kharkov Polytechnical Institute, Frunze st.21, 310002 Kharkov, USSR and M. Oszwałdowski Technical University of Poznań, Piotrowo 3, 60-965 Poznań, Poland |
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| 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. |
| DOI: 10.12693/APhysPolA.80.329 PACS numbers: 73.40.-c, 73.60.Fw, 74.60.-w |