O-17-NMR Knight shift study of the interplay between superconductivity and pseudogap in (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy

Article

关键词: HIGH-T-C;    MAGNETIC-PROPERTIES;    TEMPERATURE;    PHASE;    FLUCTUATIONS;    DENSITY;    STATE;    LINE;   

DOI  :  10.1103/PhysRevB.90.054508

来源: SCIE

【 摘 要 】

We report systematic O-17-NMR measurements on the high-T-c cuprate (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy, for four different families (different x). Using Knight shift data, we show that the pseudogap opening temperature T* is much higher than T-c near optimal doping, unlike structurally similar YBCO. In addition, at constant doping the pseudogap temperature does not vary with x, in contrast to T-c. This puts constraints on the nature of the pseudogap and position of the quantum critical point inside the superconducting dome.

【 授权许可】

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