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Effect of Co Impurities on Superconductivity of FeSe0.4Te0.6 single crystals

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arxiv 1107.0095 v2 pith:2WC6PZR4 submitted 2011-07-01 cond-mat.supr-con

Effect of Co Impurities on Superconductivity of FeSe0.4Te0.6 single crystals

Fuyuki Nabeshima , Yusuke Kobayashi , Yoshinori Imai , Ichiro Tsukada , Atsutaka Maeda This is my paper
classification cond-mat.supr-con
keywords dopingcrystalseffectsinglesuperconductivitychangingconsistentdata
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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