Anomalies in the superconducting dome of the Bi-cuprates

Details Anomalies in the superconducting dome of the Bi-cuprates Anomalies in the superconducting dome of the Bi-cuprates

2010-12-14

arxiv.org/abs/1012.3126v1

Physics

Condensed Matter

Superconductivity

Scientific paper

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.

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