Multiband Description of Optical Conductivity in Ferropnictide Superconductors


Тип публикации: статья из журнала

Год издания: 2013

Идентификатор DOI: 10.1007/s10948-013-2150-3

Ключевые слова: Multiband superconductivity, Optical conductivity, Effects of disorder, Experimental datum, Multi-band superconductors, Novel superconductor, Order parameter symmetry, Paramagnetic impurity, Single-band superconductors, Paramagnetism, Superconductivity, Superconducting materials

Аннотация: We study optical properties of the multiband superconductors with an s(+/-) order parameter symmetry. By comparing results of our theory with experimental data on optical conductivity for Ba0.68K0.32Fe2As2 single crystals, we show that satisfactory description of the novel superconductors can be obtained only considering a strong eПоказать полностьюlectron-boson coupling. We reexamine the effect of disorder and demonstrate that multiband superconductors are more robust with respect to it than naively expected by simple analogy with paramagnetic impurities in single-band superconductors. Moreover, disorder may give rise to new effects, in particular to a phase transition s(+/-) -> s(++). We discuss how the systematic study of disorder impact on the density of states and the optical conductivity may provide information on the underlying order parameter structure.

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Выпуск журнала: Vol. 26, Is. 8

Номера страниц: 2637-2640

ISSN журнала: 15571939

Место издания: NEW YORK

Издатель: SPRINGER


  • Dolgov O.V. (Max Planck Institute for Solid State Research)
  • Efremov D.V. (Max Planck Institute for Solid State Research)
  • Charnukha A. (Max Planck Institute for Solid State Research)
  • Boris A.V. (Max Planck Institute for Solid State Research)
  • Korshunov M.M. (Siberian Federal University)
  • Golubov A.A. (Faculty of Science and Technology and MESA+ Institute of Nanotechnology)