期刊
PHYSICAL REVIEW B
卷 62, 期 18, 页码 12527-12533出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.62.12527
关键词
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We report measurements of the oxygen isotope effect in high-temperature superconductors. We extend previous oxygen isotope measurements to high hole concentrations and show that the data can be analyzed in terms of a hole-concentration-independent oxygen isotope effect in the overdoped region. Measurements of the oxygen isotope effect in YBa2(Cut-xNix)(4)O-8 are also presented. We show that the hole-concentration- and impurity-concentration-induced changes in the isotope-effect coefficient can be consistently modeled by including the effect of the normal-state pseudogap.
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