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Number of results

Journal

2009 | 7 | 2 | 251-256

Article title

Two-gap superconductivity in the Fe-1111 superconductor LaFeAsO1−x
Fx: A point-contact Andreev-reflection study

Content

Title variants

Languages of publication

EN

Abstracts

EN
Point-contact Andreev-reflection (PCAR) experiments were performed in the Fe-1111 layered superconductor LaFeAsO0.9F0.1 with resistive T
con ∼ 27 K. The observation of two pairs of peaks in the low-temperature Andreev-reflection spectra clearly indicates the presence of two order parameters. The behavior of the two gaps as a function of temperature, obtained by fitting the conductance curves by means of the generalized two-band Blonder-Tinkham-Klapwijk model, shows some anomalies. A theoretical analysis performed within the two-band Eliashberg theory with a generic electron-boson coupling can reproduce the low-temperature value of the two gaps but generally fails in giving a satisfactory fit of their overall temperature dependence, indicating the rich and complex physics of these newly discovered superconductors.

Publisher

Journal

Year

Volume

7

Issue

2

Pages

251-256

Physical description

Dates

published
1 - 6 - 2009
online
26 - 4 - 2009

Contributors

  • Dipartimento di Fisica and CNISM, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129, Torino, Italy
  • Dipartimento di Fisica and CNISM, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129, Torino, Italy
author
  • Dipartimento di Fisica and CNISM, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129, Torino, Italy
  • Dipartimento di Fisica and CNISM, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129, Torino, Italy
  • P. N. Lebedev Physical Institute, Russian Academy of Sciences, Leninskiy Prospekt 53, 119991, Moscow, Russia
author
  • Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569, Stuttgart, Germany

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11534-009-0017-9
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