Transmittance and reflectance measurements at terahertz frequencies on a superconducting BaFe1.84Co0.16As2 ultrathin film: an analysis of the optical gaps in the Co-doped BaFe2As2 pnictide (Articolo in rivista)

Type
Label
  • Transmittance and reflectance measurements at terahertz frequencies on a superconducting BaFe1.84Co0.16As2 ultrathin film: an analysis of the optical gaps in the Co-doped BaFe2As2 pnictide (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1140/epjb/e2013-30964-y (literal)
Alternative label
  • Andrea Perucchi1, Leonetta Baldassarre1, Boby Joseph2, Stefano Lupi3, Sanghan Lee4, Chang Beom Eom4, Jianyi Jiang5, Jeremy D. Weiss5, Eric E. Hellstrom5 and Paolo Dore6 (2013)
    Transmittance and reflectance measurements at terahertz frequencies on a superconducting BaFe1.84Co0.16As2 ultrathin film: an analysis of the optical gaps in the Co-doped BaFe2As2 pnictide
    in The European physical journal. B, Condensed matter physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Andrea Perucchi1, Leonetta Baldassarre1, Boby Joseph2, Stefano Lupi3, Sanghan Lee4, Chang Beom Eom4, Jianyi Jiang5, Jeremy D. Weiss5, Eric E. Hellstrom5 and Paolo Dore6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 86 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 6 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 Sincrotrone Trieste, S.C.p.A., Area Science Park, 34012 Basovizza, Trieste, Italy 2 Dipartimento di Fisica, Università di Roma Sapienza, P.le Aldo Moro 2, 00185 Roma, Italy 3 CNR-IOM and Dipartimento di Fisica, Università di Roma Sapienza, P.le Aldo Moro 2, 00185 Roma, Italy 4 Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA 5 Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University, 2031 East Paul Dirac Drive, Tallahassee, FL 32310, USA 6 CNR-SPIN and Dipartimento di Fisica, Università di Roma Sapienza, P.le Aldo Moro 2, 00185 Roma, Italy (literal)
Titolo
  • Transmittance and reflectance measurements at terahertz frequencies on a superconducting BaFe1.84Co0.16As2 ultrathin film: an analysis of the optical gaps in the Co-doped BaFe2As2 pnictide (literal)
Abstract
  • Here we report an optical investigation in the terahertz region of a 40 nm ultrathin BaFe1.84Co0.16As2 superconducting film with superconducting transition temperature T-c = 17.5 K. A detailed analysis of the combined reflectance and transmittance measurements showed that the optical properties of the superconducting system can be described in terms of a two-band, two-gap model. The zero temperature value of the large gap Delta(B), which seems to follow a BCS-like behavior, results to be Delta(B)(0) = 17 cm(-1). For the small gap, for which Delta(A)(0) = 8 cm(-1), the temperature dependence cannot be clearly established. These gap values and those reported in the literature for the BaFe2-xCoxAs2 system by using infrared spectroscopy, when put together as a function of T-c, show a tendency to cluster along two main curves, providing a unified perspective of the measured optical gaps. Below a temperature around 20 K, the gap-sizes as a function of T-c seem to have a BCS-like linear behavior, but with different slopes. Above this temperature, both gaps show different supra-linear behaviors. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it