Possible singlet-to-triplet pairing transition in NaxCoO2 center dot yH(2)O

Article

关键词: UPPER CRITICAL-FIELD;    CRITICAL MAGNETIC-FIELD;    SUPERCONDUCTIVITY;    TEMPERATURE;    DEPENDENCE;    SPIN;   

DOI  :  10.1103/PhysRevB.70.144516

来源: SCIE

【 摘 要 】

We present precise measurements of the upper critical field (H-c2) in the recently discovered cobalt oxide superconductor. We have found that the critical field has an unusual temperature dependence; namely, there is an abrupt change of the slope of H-c2(T) in a weak-field regime. In order to explain this result we have derived and solved Gor'kov equations on a triangular lattice. Our experimental results may be interpreted in terms of the field-induced transition from singlet to triplet superconductivity.

【 授权许可】

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