Published August 15, 2014 | Version v1
Journal article Metadata-only

Evaluation of superconducting gaps in optimally doped Ba(Fe1−xCox)2As2/Fe bilayers by ultrafast time-resolved spectroscopy

Creators

  • 1. CNR-SPIN, I-80125 Napoli (Italy)
  • 2. Dipartimento Scienze Fisiche, Università di Napoli Federico II, Facoltà di Ingegneria, I-80125 Napoli (Italy)
  • 3. IFW Dresden, P.O. Box 270116, 01171 Dresden (Germany)

Description

Highlights: • Femtosecond spectroscopy measurements in FeSe0.5Te05 with Tc = 19 K are reported. • An estimation of a temperature-dependent energy gap Δ(T) at T < Tc is reported. • An electron–phonon constant λ = 06 is estimated. - Abstract: Measurements of nonequilibrium quasi-particle relaxation dynamics by using ultrafast pump and probe technique in optimally Co-doped Ba(Fe2As2)/Fe thin film has been reported. Multiple relaxation processes are present with BCS-like temperature-dependent superconducting gaps Δ0 = (3.67 ± 0.13) meV and Δ1 = (6.1 ± 0.1) meV, which are calculated considering the conventional electron-boson and spin fluctuations pairing mechanism. Then, the value of the electron–phonon coupling constant of λ = 0.18 has been obtained

Availability note (English)

Available from http://dx.doi.org/10.1016/j.physc.2014.04.013

Additional details

Identifiers

DOI
10.1016/j.physc.2014.04.013;
PII
S0921-4534(14)00121-X;

Publishing Information

Journal Title
Physica. C, Superconductivity
Journal Volume
503
Journal Page Range
p. 132-135
ISSN
0921-4534
CODEN
PHYCE6

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46120774
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BARIUM COMPOUNDS; COUPLING CONSTANTS; DOPED MATERIALS; ELECTRONS; FLUCTUATIONS; IRON; IRON ARSENIDES; IRON SELENIDES; LAYERS; MEV RANGE 01-10; PHONONS; PHOTON-ELECTRON COLLISIONS; PROBES; RELAXATION; SPECTROSCOPY; SPIN; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; THIN FILMS; TIME RESOLUTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ANGULAR MOMENTUM; ARSENIC COMPOUNDS; ARSENIDES; CHALCOGENIDES; COLLISIONS; ELECTRON COLLISIONS; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; FERMIONS; FILMS; IRON COMPOUNDS; LEPTONS; MATERIALS; METALS; MEV RANGE; PARTICLE PROPERTIES; PHOTON COLLISIONS; PNICTIDES; QUASI PARTICLES; RESOLUTION; SELENIDES; SELENIUM COMPOUNDS; TIMING PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; VARIATIONS

Optional Information

Copyright
Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.