Temperature dependence of the superfluid density as a probe for multiple gaps in Ba(Fe0.9Co0.1)2As2: Manifestation of three weakly interacting condensatesстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 31 октября 2014 г.
Аннотация:The knowledge about the gap size and structure is of utmost importance for a theory of the superconducting
pairing mechanism. The number of superconducting gaps is an important part of the description and modeling
of multiband systems such as the iron-based superconductors. Here, we present a study on the temperature
dependence of the superfluid density, ρs(T), in Ba(Fe0.9Co0.1)2As2 obtained from terahertz spectra of conductivity and dielectric permittivity of thin film samples with critical temperatures Tc ≈ 20–22 K. We demonstrate that the temperature dependence of the superfluid density, ρs(T), can be explained best by a model of three interacting superconducting condensates. Our results refine the standard two-band approach for Co-doped BaFe2As2.