Two-band conductivity of a FeSe0.5Te0.5 film by reflectance measurements in the terahertz and infrared range (Articolo in rivista)

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  • Two-band conductivity of a FeSe0.5Te0.5 film by reflectance measurements in the terahertz and infrared range (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0953-2048/27/12/125011 (literal)
Alternative label
  • Perucchi, A.; Joseph, B.; Caramazza, S.; Autore, M.; Bellingeri, E.; Kawale, S.; Ferdeghini, C.; Putti, M.; Lupi, S.; Dore, P. (2014)
    Two-band conductivity of a FeSe0.5Te0.5 film by reflectance measurements in the terahertz and infrared range
    in Superconductor science and technology (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Perucchi, A.; Joseph, B.; Caramazza, S.; Autore, M.; Bellingeri, E.; Kawale, S.; Ferdeghini, C.; Putti, M.; Lupi, S.; Dore, P. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 27 (literal)
Rivista
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  • 6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 12 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • INSTM Udr Trieste ST & Elettra Sincrotrone Triest; Sapienza University Rome; CNR SPIN; University of Genoa; University of Genoa; Sapienza University Rome; Sapienza University Rome (literal)
Titolo
  • Two-band conductivity of a FeSe0.5Te0.5 film by reflectance measurements in the terahertz and infrared range (literal)
Abstract
  • We report an infrared spectroscopy study of a 200 nm thick FeSe0.5Te0.5 film grown on LaAlO3 with T-c = 13.7 K. We analyze the 20 K normal state absolute reflectance R-N measured over a broad infrared range and the reflectance ratio R-S/R-N, R-S being the superconducting state reflectance, measured at 6 K in the terahertz range down to 12 cm(-1). We show that the normal state model conductivity is given by two Drude components, one of which much broader and intense than the other. In the superconducting state, we find that a gap Delta = 37 +/- 3 cm(-1) opens up in the narrow Drude band only, while the broad Drude band results to be ungapped, at least in the explored spectral range. Our results show that only a two-band model can coherently describe both normal and superconducting state data. (literal)
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