Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki
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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2014, Volume 100, Issue 5, Pages 366–373
DOI: https://doi.org/10.7868/S0370274X14170081 (Mi jetpl4115) 		 
CONDENSED MATTER

Study of the structure of a superconducting state of Co-doped BaFe$_2$As$_2$ multiband compounds

A. E. Karakozova, B. P. Gorshunovbcd, Ya. G. Ponomareve, A. S. Prokhorovbc, V. S. Nozdrinb, M. V. Magnitskayaa, E. S. Zhukovabcd, K. Iidaf, M. Dresseld, S. Zapfd, S. Haindlgh

a Institute for High Pressure Physics, Russian Academy of Sciences
b A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow
c Moscow Institute of Physics and Technology
d Physikalisches Institut, Universitat Stuttgart
e M. V. Lomonosov Moscow State University, Faculty of Physics
f Institute for Metallic Materials, IFW Dresden
g Leibniz Institute for Solid State and Material Research
h Physikalisches Institut, Experimentalphysik II, University of Tubingen
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DOI: https://doi.org/10.7868/S0370274X14170081
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 BaFe$_{1-x}$Co$_x$As$_2$ 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: $\Delta_1\approx15\,$cm$^{-1}$, $\Delta_2\approx21\,$cm$^{-1}$, and $\Delta_3\approx(30{-}35)\,$cm$^{-1}$. The results significantly refine the existing notions on the structure of the superconducting state of Co-doped BaFe$_2$As$_2$ multiband compounds.
Received: 24.07.2014
English version:
Journal of Experimental and Theoretical Physics Letters, 2014, Volume 100, Issue 5, Pages 328–335
DOI: https://doi.org/10.1134/S002136401417007X
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: 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, “Study of the structure of a superconducting state of Co-doped BaFe$_2$As$_2$ multiband compounds”, Pis'ma v Zh. Èksper. Teoret. Fiz., 100:5 (2014), 366–373; JETP Letters, 100:5 (2014), 328–335
Citation in format AMSBIB
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