JETP Letters

, Volume 100, Issue 5, pp 328–335 | Cite as

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

  • A. E. KarakozovEmail author
  • 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
Condensed Matter


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.


JETP Letter Superconducting State Optical Conductivity Band Model BaFe 
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Copyright information

© Pleiades Publishing, Inc. 2014

Authors and Affiliations

  • A. E. Karakozov
    • 1
    Email author
  • B. P. Gorshunov
    • 2
    • 3
    • 4
  • Ya. G. Ponomarev
    • 5
  • A. S. Prokhorov
    • 2
    • 3
  • V. S. Nozdrin
    • 3
  • M. V. Magnitskaya
    • 1
  • E. S. Zhukova
    • 2
    • 3
    • 4
  • K. Iida
    • 6
  • M. Dressel
    • 4
  • S. Zapf
    • 4
  • S. Haindl
    • 7
    • 8
  1. 1.Institute for High Pressure PhysicsRussian Academy of SciencesTroitskRussia
  2. 2.Moscow Institute of Physics and Technology (State University)Dolgoprudnyi, Moscow regionRussia
  3. 3.Prokhorov General Physics InstituteRussian Academy of SciencesMoscowRussia
  4. 4.1. Physikalisches InstitutUniversität StuttgartStuttgartGermany
  5. 5.Faculty of PhysicsMoscow State UniversityMoscowRussia
  6. 6.Institute for Metallic MaterialsDresdenGermany
  7. 7.Physikalisches Institut, Experimentalphysik IIUniversity of TübingenTübingenGermany
  8. 8.Institute for Solid State ResearchLeibniz Institute for Solid State and Materials Research DresdenDresdenGermany

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