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Journal Article

Normal State Resistivity of Ba1-xKxFe2As2: Evidence for Multiband Strong-Coupling Behavior

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Golubov,  A. A.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Dolgov,  O. V.
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Boris,  A. V.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Lin,  C. T.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Golubov, A. A., Dolgov, O. V., Boris, A. V., Charnukha, A., Sun, D. L., Lin, C. T., et al. (2011). Normal State Resistivity of Ba1-xKxFe2As2: Evidence for Multiband Strong-Coupling Behavior. JETP Letters, 94(4), 333-337.


Cite as: https://hdl.handle.net/21.11116/0000-000E-BE8F-C
Abstract
The normal state resistivity in multiband superconductors has been analyzed in the framework of Eliashberg theory. The results are compared with measurements of the temperature dependence of normal state resistivity of high-purity Ba(0.68)K(0.32)Fe(2)As(2) single crystals with the highest reported transition temperature T(c) = 38.5 K. The experimental data demonstrate strong deviations from the Bloch-Gruneisen behavior, namely the tendency to saturation of the resistivity at high temperatures. The observed behavior of the resistivity is explained within the two band scenario when the first band is strongly coupled and relatively clean, while the second band is weakly coupled and is characterized by much stronger impurity scattering. DOI: 10.1134/S0021364011160041