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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2006, Volume 83, Issue 9, Pages 473–478 (Mi jetpl1300)  

This article is cited in 5 scientific papers (total in 5 papers)

CONDENSED MATTER

Observation of a transition from BCS to HTSC-like superconductivity in Ba1 − xKxBiO3 single crystals

G. E. Tsydynzhapov, A. F. Shevchun, M. R. Trunin, V. N. Zverev, D. V. Shovkun, N. V. Barkovskii, L. A. Klinkova

Institute of Solid State Physics, Russian Academy of Sciences
Full-text PDF (836 kB) Citations (5)
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Abstract: The temperature dependences of the upper critical field B c2(T) and surface impedance Z(T) = R(T) + iX(T) have been measured in Ba1 − x KxBiO3 single crystals with transition temperatures 6 ≤ T c ≤ 32 K (0.6 > x > 0.4). A transition from the BCS to an unusual type of superconductivity has been revealed: B c2(T) curves of the crystals with T c > 20 K have positive curvature (as in some HTSCs), and those of the crystals with T c < 15 K described by the usual Werthamer-Helfand-Hohenberg (WHH) formula. The R(T) and X(T) dependences of the crystals with T c ≈ 32 K and T c ≈ 11 K in the temperature range TT c are linear (as in HTSCs) and exponential (BCS), respectively. The experimental results are discussed using the extended saddle point model by Abrikosov.
Received: 31.03.2006
English version:
Journal of Experimental and Theoretical Physics Letters, 2006, Volume 83, Issue 9, Pages 405–409
DOI: https://doi.org/10.1134/S0021364006090086
Bibliographic databases:
Document Type: Article
PACS: 74.20.-z,74.70.-b
Language: Russian


Citation: G. E. Tsydynzhapov, A. F. Shevchun, M. R. Trunin, V. N. Zverev, D. V. Shovkun, N. V. Barkovskii, L. A. Klinkova, “Observation of a transition from BCS to HTSC-like superconductivity in Ba1 − xKxBiO3 single crystals”, Pis'ma v Zh. Èksper. Teoret. Fiz., 83:9 (2006), 473–478; JETP Letters, 83:9 (2006), 405–409
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  • This publication is cited in the following 5 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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    Письма в Журнал экспериментальной и теоретической физики Pis'ma v Zhurnal Иksperimental'noi i Teoreticheskoi Fiziki
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