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Multigap superconductivity in doped p-type cuprates

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Abstract

Andreev and tunneling spectroscopy studies of Bi2Sr2Ca n − 1Cu n O2n + 4 + δ, HgBa2Ca n − 1Cu n O2n + 2 + δ and Tl2Ba2Ca n − 1Cu2n + 4 + δ have shown that superconductivity in single-layer (n = 1) and two-layer (n = 2) phases has a single-gap character. Qualitatively different results were obtained for three-layer phases. In doped p-type Hg-1223, Bi-2223, and Tl-2223 samples two (or three) superconducting gaps were observed. The existence of multigap superconductivity in superconducting cuprates with n ≥ 3 is explained by a difference in doping levels of outer (OP) and internal (IP) CuO2 planes.

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Authors and Affiliations

  1. Faculty of Physics, Moscow State University, Moscow, 119991, Russia

    Ya. G. Ponomarev, S. V. Kulbachinskii, M. G. Mikheev, M. V. Sudakova & S. N. Tchesnokov

  2. Faculty of Chemistry, Moscow State University, Moscow, 119991, Russia

    V. A. Alyoshin, E. V. Antipov & T. E. Oskina

  3. Institut für Physik, Humboldt-Universität zu Berlin, D-12489, Berlin, Germany

    A. Krapf

  4. Lenin Russian Electrotechnical Institute, Moscow, 111250, Russia

    S. V. Kulbachinskii & L. M. Fisher

Authors
  1. Ya. G. Ponomarev
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  2. V. A. Alyoshin
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  3. E. V. Antipov
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  4. T. E. Oskina
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  5. A. Krapf
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  6. S. V. Kulbachinskii
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  7. M. G. Mikheev
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  8. M. V. Sudakova
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  9. S. N. Tchesnokov
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  10. L. M. Fisher
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Corresponding author

Correspondence to Ya. G. Ponomarev.

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Ponomarev, Y.G., Alyoshin, V.A., Antipov, E.V. et al. Multigap superconductivity in doped p-type cuprates. Jetp Lett. 100, 126–132 (2014). https://doi.org/10.1134/S0021364014140100

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  • DOI: https://doi.org/10.1134/S0021364014140100

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