Evidence for nonexistence of superconductivity in an isolated CuO2 bilayer
Mun-Seog Kim, Jae-Hyuk Choi, Sung-Ik Lee
DOI 10.1103/PhysRevB.63.092507 · Physical Review B
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Abstract
We report the magnetization measurements for the organic-chain [Py−CnH2n+1]2HgI4 (n=2, 4, 6, 8, 10, and 12) intercalated Bi2Sr2CaCu2O8 for which the intercalation accompanies no charge transfer between the host and the guest materials. We observed a complete disappearance of superconductivity in Bi2Sr2CaCu2O8 due to drastically increased distance for the next-nearest-neighbor CuO2 plane, even though the distance for the nearest-neighbor plane is unchanged. This result leads us to the conclusion that the three-dimensional linkage of CuO2 planes via the interlayer coupling is essential to high-temperature superconductivity. In other words, the isolated CuO2 bilayer does not give a finite Tc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | onset |
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