Absence of the 1/8 anomaly in the oxygen isotope effect of YBa2Cu3Oy

Article

关键词: INPLANE PENETRATION DEPTH;    SUPERCONDUCTORS;    LA2-XSRXCUO4;    DEPENDENCE;    TRANSITION;    DENSITY;    OXIDES;    COPPER;    SHIFT;   

DOI  :  10.1103/PhysRevB.89.060505

来源: SCIE

【 摘 要 】

We have prepared oxygen isotope exchanged crystals of impurity-free YBa2Cu3Oy with various oxygen contents, and examined pure doping (p) dependence of isotope effect on superconducting transition temperature. With decreasing oxygen contents, the isotope exponent alpha monotonously increases without any anomaly around p = 1/8. The monotonous increase in alpha indicates that phonons are involved in the mechanism which causes the monotonous T-c suppression with underdoping.

【 授权许可】

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