Effect of Co Impurities on Superconductivity of FeSe0.4Te0.6 single crystals
classification
❄️ cond-mat.supr-con
keywords
dopingcrystalseffectsinglesuperconductivitychangingconsistentdata
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The effect of Co doping on supercoductivity of FeSe$_{0.4}$Te$_{0.6}$ single crystals is investigated. The superconducting transition temperature decreases linearly for Co doping with the rate -0.75 K/(Co %). On the other hand, the residual resistivity increase is less than 50 $/mu/Omega$cm for 4 % Co doping. These data are consistent with the sign changing interband scattering mechanism of superconductivity ($s_/pm$ symmetry).
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