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Study of the structure of a superconducting state of Co-doped BaFe2As2 multiband compounds

  • Condensed Matter
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Abstract

The terahertz and infrared spectra of the complex dynamic conductivity, as well as the temperature dependences of the density of a superconducting condensate and the electronic specific heat of superconducting Ba(Fe1 − x Co x )2As2 compounds, have been analyzed within a Bardeen-Cooper-Schrieffer-like model of a multiband superconductor with strong coupling. It has been shown that the superconducting state of these compounds is determined by three (one electronic and two hole) weakly interacting condensates. The order parameters of the condensates are: Δ1 ≈ 15 cm−1, Δ2 ≈ 21 cm−1, and Δ3 ≈ 30–35 cm−1. The results significantly refine the existing notions on the structure of the superconducting state of Co-doped BaFe2As2 multiband compounds.

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Authors and Affiliations

  1. Institute for High Pressure Physics, Russian Academy of Sciences, Kaluzhskoe sh. 14, Troitsk, 142190, Russia

    A. E. Karakozov & M. V. Magnitskaya

  2. Moscow Institute of Physics and Technology (State University), Institutskii per. 9, Dolgoprudnyi, Moscow region, 141700, Russia

    B. P. Gorshunov, A. S. Prokhorov & E. S. Zhukova

  3. Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia

    B. P. Gorshunov, A. S. Prokhorov, V. S. Nozdrin & E. S. Zhukova

  4. 1. Physikalisches Institut, Universität Stuttgart, 70550, Stuttgart, Germany

    B. P. Gorshunov, E. S. Zhukova, M. Dressel & S. Zapf

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

    Ya. G. Ponomarev

  6. Institute for Metallic Materials, D 01069, Dresden, Germany

    K. Iida

  7. Physikalisches Institut, Experimentalphysik II, University of Tübingen, 72076, Tübingen, Germany

    S. Haindl

  8. Institute for Solid State Research, Leibniz Institute for Solid State and Materials Research Dresden, 01069, Dresden, Germany

    S. Haindl

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  1. A. E. Karakozov
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  3. Ya. G. Ponomarev
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  7. E. S. Zhukova
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  8. K. Iida
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  9. M. Dressel
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  10. S. Zapf
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Correspondence to A. E. Karakozov.

Additional information

Original Russian Text © A.E. Karakozov, B.P. Gorshunov, Ya.G. Ponomarev, A.S. Prokhorov, V.S. Nozdrin, M.V. Magnitskaya, E.S. Zhukova, K. Iida, M. Dressel, S. Zapf, S. Haindl, 2014, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2014, Vol. 100, No. 5, pp. 366–373.

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Karakozov, A.E., Gorshunov, B.P., Ponomarev, Y.G. et al. Study of the structure of a superconducting state of Co-doped BaFe2As2 multiband compounds. Jetp Lett. 100, 328–335 (2014). https://doi.org/10.1134/S002136401417007X

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  • DOI: https://doi.org/10.1134/S002136401417007X

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