Superconducting (1:1:2:2)-type layered cuprates of the formula TlCA1−xLxSr2Cu2Oy (L=Y or rare-earth element)
C. N. R. Rao, A. K. Ganguli, R. Vijayaraghavan
DOI 10.1103/PhysRevB.40.2565 · Physical Review B
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Abstract
The TlCa1−xLxSr2Cu2Oy (L=Y or a rare earth element) series of cuprates possessing a (1:1:2:2)-type layered structure exhibit superconductivity in the 60–90-K region. The TlCa1−xLxSr2Cu2Oy (x=1) series of cuprates also possess the (1:1:2:2)-type structure, but are not superconducting. A change in the conduction mechanism seems to occur in the TlCa1−xLxSr2Cu2Oy system with a change in x. Partial substitution of Tl by Pb does not favor superconductivity in this series of cuprates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| TlCa1-xLxSr2Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 75 | Pressure not reported | onset |
| TlCa0.5La0.5Sr2Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 75 | Pressure not reported | onset |
| TlCa0.5Nd0.5Sr2Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 75 | Pressure not reported | onset |
| TlCa0.5Y0.5Sr2Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 75 | Pressure not reported | onset |
| TlCa0.5Pr0.5Sr2Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 75 | Pressure not reported | onset |
| TlCaSr2Cu2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 50 | Pressure not reported | unknown |
| Tl0.5Pb0.5CaSr2Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| Tl0.5Pb0.5Ca2Sr2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 120 | Pressure not reported | unknown |
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