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 language | English |
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Article number | 013032 |
Journal | New Journal of Physics |
Volume | 15 |
DOIs | |
Publication status | Published - 2013 |
Fields of Expertise
- Advanced Materials Science
Treatment code (Nähere Zuordnung)
- Theoretical
- Experimental