Scaling of the Temperature Dependent Resistivity in 111 Iron-Pnictide Superconductors

Autor: Stefan-Ludwig Drechsler, Sergiu Levcenko, G. Fuchs, Ernest Arushanov
Rok vydání: 2013
Předmět:
Zdroj: Journal of Superconductivity and Novel Magnetism. 26:2727-2734
ISSN: 1557-1947
1557-1939
Popis: In various \(\mathrm{FeTe}_{1-x}\mathrm{Se}_{\mathrm{x}}\) (x=0–1), members of the 11-iron-pnictide superconductor family, the temperature dependent resistivity ρ can be scaled into a universal curve. It is found that the ρ(T) dependences can be reproduced by the expressions \(\rho(T) = \rho_{0} - (c/T)\exp( - \frac{2\varDelta }{T})\) and \(\rho(T) =\rho_{0} + (c/T)\exp( - \frac{2\varDelta }{T})\) for x=0–0.3 and 0.4–1.0, respectively. The scaling was performed using the energy scale 2Δ, the parameter c, and the residual resistivity ρ0 as scaling parameters. The compositional variation of the scaling parameters 2Δ and ρ0 has been determined. The existence of a universal metallic ρ(T) curve is interpreted as an indication of a single mechanism which dominates the scattering of the charge carriers in FeTe1−xSex (x=0–1). Thus, the scaling of the normal-state properties seems to be a general feature not only for high-Tc cuprates but also for the iron-pnictides superconductor family.
Databáze: OpenAIRE
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