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arxiv: cond-mat/0312242 · v1 · submitted 2003-12-10 · ❄️ cond-mat.supr-con · cond-mat.str-el

Impurity Effects on the Superconducting Transition Temperature of NazCoO2.yH2O

classification ❄️ cond-mat.supr-con cond-mat.str-el
keywords beenordersuperconductingtemperaturetransitionyh2oanisotropicarguments
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Superconducting transition temperature Tc of NazCo1-xMxO2.yH2O has been studied for M=Ir and Ga, which can substitute for Co. It has been found that Tc is suppressed by the M-atom doping. The decreasing rates |dTc/dx| are of the order of 1 K/% and too small to be explained by the pair breaking mechanism for the anisotropic order parameters by non-magnetic impurities. Brief arguments are given on possible origins of the Tc suppression.

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