Terahertz conductivity in FeSe_0.5Te_0.5 superconducting films

Andreij Pimenov, S Engelbrecht, A. M. Shuvaev, B. B. Jin, P. H. Wu, B. Xu, L. X. Cao, Ewald Schachinger

Research output: Contribution to journalArticle

Abstract

Complex conductivity of FeSe0.5Te0.5 superconducting films has been investigated using backward-wave-oscillator spectroscopy in the terahertz frequency range. The normal state conductivity corresponds well to the low-frequency limit of a Drude metal. In the superconducting state, the real part of the complex conductivity is not completely suppressed, indicating the existence of a strongly anisotropic gap. Weak features in the conductivity are consistent with the superconducting gap value close to 12 cm−1(1.5 meV). The experimental results are discussed within the framework of a two-gap model based on the s± symmetry of the order parameter.
Original languageEnglish
Article number013032
JournalNew Journal of Physics
Volume15
DOIs
Publication statusPublished - 2013

Fields of Expertise

  • Advanced Materials Science

Treatment code (Nähere Zuordnung)

  • Theoretical
  • Experimental

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