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arXiv 1012.3126cond-mat.supr-concond-mat.str-el
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Bi-铜氧化物超导圆顶中的反常现象

Anomalies in the superconducting dome of the Bi-cuprates

L. Dudy, A. Krapf, H. Dwelk, S. Rogaschewski, B. Müller, O. Lübben, C. Janowitz, R. Manzke

摘要:

我们报告表征结果的能量色散X射线分析和交流敏感性的统计相关数量的单层铋铜酸盐单晶。我们发现,两个结构上完全不同的修改的单层铋铜酸盐,即(La,Pb=0.4)-Bi 2201和La-Bi 2201,表现出异常的超导转变温度在一定的空穴掺杂,例如在1/8孔每铜。这些掺杂值与Komiya等人在LSCO随温度变化的电阻中发现的“魔法掺杂分数”一致。这组新的发现表明,所有这些异常对于空穴掺杂的高温超导体都是通用的。

英文摘要:

We report characterization results by energy dispersive x-ray analysis and AC-susceptibility for a statistically relevant number of single layer Bi-cuprate single crystals. We show that the two structurally quite different modifications of the single-layered Bi-cuprate, namely (La,Pb=0.4)-Bi2201 and La-Bi2201, exhibit anomalies in the superconducting transition temperature at certain hole doping, e.g. at 1/8 holes per Cu. These doping values agree well with the 'magic doping fractions' found in the temperature dependent resistance of LSCO by Komiya et al. This new set of findings suggests that all these anomalies are generic for the hole-doped high-temperature superconductors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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