Anomalous suppression of superconductivity in Zn-substituted Bi2Sr2Ca1−xYx(Cu1−yZny)2O8+δ
Megumi Akoshima, Takashi Noji, Yasuhiro Ono, Yoji Koike
DOI 10.1103/PhysRevB.57.7491 · Physical Review B
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Abstract
We have found an anomalous suppression of superconductivity at x=0.30–0.35, where p (the hole concentration per Cu) ∼ 1/8, in the partially Zn-substituted compound Bi2Sr2Ca1−xYx(Cu1−yZny)2O8+δ with y=0.02–0.03. In these samples with p∼1/8 and y=0.02–0.03, transport properties such as electrical resistivity and thermoelectric power exhibit less metallic behavior than usual. There is a possibility that a kind of order of holes and/or spins is stabilized owing to pinning by Zn, as in the La-based cuprate. It is likely that the so-called “1/8 problem” is not only characteristic of the La-based cuprate but also common to all high-Tc cuprates including CuO2 planes in their crystal structures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2Ca1-xYx(Cu1-yZny)2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | midpoint |
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