| We have prepared single crystals of CuxBi2Se3 using modified Bridgman method. The results of transport measurements indicate that the superconducting samples share common anomalous temperature dependent magnetoresistance feature, in which a magnetic field tuned "crossover behavior" was observed. The IV results suggest that the important role of superconducting Cooper electrons pairs tunneling between normal state region and superconducting islands in the observed anomalous transport phenomenon. |
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