The crystal-chemical structure and "high-temperature" superconductivity (HTSC) of multi-component metal–oxide compounds

doi:10.26565/2222-5617-2018-28-7

Yu. I. Boyko V. Karazin Kharkov National University, 4 Svobody Sq., 61022 Kharkiv, Ukraine,
V. V. Bogdanov V. Karazin Kharkov National University, 4 Svobody Sq., 61022 Kharkiv, Ukraine,
R. V. Vovk V.N. Karazin Kharkiv National University, 4 Svobody Square, Kharkiv, 61022, Ukraine

DOI: https://doi.org/10.26565/2222-5617-2018-28-7

Keywords: high-temperature superconductors, structure, negative U-centers

Abstract

An analysis of the crystal structure of high-temperature superconductors of the YBa2Cu3O7–x type is provided and the reasons for the formation of specific chemical bonds between different ions leading to the formation of negative U-centers clusters in this compound is discussed. Experimental facts are also discussed, which indicate a close relationship between the crystal-chemical structure of metal-oxide compounds and their anomalous electric conductivity.
On the basis of the analysis, the conditions for the selection of elements for the synthesis of compounds characterized by a higher temperature of transition to the superconducting state are formulated.

Downloads

Download data is not yet available.

References

1. J. G. Bednorz, K. A. Mueller, Z. Phys.,B64, p. 189, 1986.
2. M. K.Wu, J. R. Ashburn and all, Phys. Rev. Lett., v. 57,p. 908, 1987.
3. J. Bardeen, L. N. Cooper, J. R. Schrieffer, Phys. Rev.,v. 108, p. 1175, 1957.
4. B. Batlog, R. G. Cava and all, Phys. Rev. Lett., v. 58 p. 2333, 1987.
5. V. L. Ginzburg, E. G. Maksimov, Phys C, v. 235 – 240, p.193, 1994.
6. M. L. Cohen, S. A. Wolf, V. Z. Kresin, Novel Superconductivity, Plenum Press, London, p. 1095, 1987.
7. O. V. Abramov, O. M. Gradov, A. Yu. Kyrie, Physica Scripta, v. 46, p. 76, 1992.
8. O. V. Abramov, O. M. Gradov, A. Yu. Kyrie, Physica Scripta, v. 48, p. 620, 1993/
9. K. V. Mitsen. O. M. Ivanenko. ZhETF. t. 118. s. 666. 2000.
10. K. V. Mitsen. O. M. Ivanenko. UFN. T. 1744. № 5. s. 545. 2004.
11. R. Evans. Vvedeniye v kristallokhimiyu. 1948. s. 367.
12. K. Yvon, M. Francois, Z. Phys., v. 76, p. 413, 1989.
13. M. Weller, H. Jaeger, G. Kaiser, K. Schulze, Phys. C, v. 162, p. 953, 1989.
14. H. Jaeger, S. Hofman, G. Kaiser, G. Petzow, Phys. C, v.153, p. 133, 1988.
15. Yu. I. Boyko, V. V. Bogdanov, R. V. Vovk, G. Ya. Khadzhai, S. V. Savich, Low Temperature Physic, v. 44, № 1, p. 63, 2018.
16. R.V.Vovk. M.O.Obolenskiy. A.A.Zavgorodniy. O.V.Bondarenko. M.G.Revyakina. N.N.Chebotayev. Vіsnik Kharkіvskogo unіversitetu. serіya fіzichna. vip. 3 (31). № 744. 2006. s. 94-96.
17. G. Fuchs, A. Gladun and all, Journ. of the Less – Common Metals, v. 151, p.103, 1989.