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Evidence for multiple superconducting gaps in optimally doped BaFe1.87Co0.13As₂ from infrared spectroscopy

  • Kim, Kyung Wan Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Rössle, Matthias Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Dubroka, Adam Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Malik, Vivek Kumar Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Wolf, Th. Institut für Festkörperphysik, Karlsruher Institut für Technologie, Karlsruhe, Germany
  • Bernhard, Christian Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
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    07.06.2010
Published in:
  • Physical Review B. - 2010, vol. 81, p. 214508
English We performed combined infrared reflection and ellipsometry measurements of the in-plane optical response of single crystals of the pnictide high-temperature superconductor BaFe1.87Co0.13As₂ with Tc=24.5 K. Our experimental data provide evidence for multiple superconducting energy gaps and can be well described in terms of three isotropic gaps with 2Δ/kBTc of 3.1, 4.7, and 9.2. The obtained low-temperature value of the in-plane magnetic penetration depth is 270 nm.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
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Identifiers
  • RERO DOC 20291
Persistent URL
https://folia.unifr.ch/unifr/documents/301721
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