Tl1Can−1Ba2CunO2n+3 (n=1,2,3): A New Class of Crystal Structures Exhibiting Volume Superconductivity at up to ≃110 K
S. S. P. Parkin, V. Y. Lee, A. I. Nazzal, R. Savoy, R. Beyers, S. J. La Placa
DOI 10.1103/PhysRevLett.61.750 · Physical Review Letters
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Abstract
We report the discovery of three new phases in the Tl-Ca-Ba-Cu-O system, Tl1Can−1Ba2CunO2n+3 n=1,2,3, one of which n=3 exhibits bulk superconductivity at ≃100 K. The crystal structures of these new materials are closely related to that of Tl2Ca2Ba2Cu3Ox, the recently discovered 125-K superconductor. All of these compounds contain Cu perovskitelike units, but whereas these are separated by bilayer Tl-O sheets in the 125-K material, they are separated by monolayer Tl-O sheets in the new structures, enabling an examination of the effect of the coupling between successive Cu perovksite units on superconducting properties.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl1Ca2Ba2Cu3O9-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 110 | Pressure not reported | unknown |
| Tl1Ca2Ba2Cu3O9-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 110 | Pressure not reported | unknown |
| Tl1Ca1Ba2Cu2O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | unknown |
| Tl2Ca2Ba2Cu3O10-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 125 | Pressure not reported | unknown |
| Tl2Ca2Ba2Cu3O10-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 125 | Pressure not reported | unknown |
| Tl2Ca1Ba2Cu2O8-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 108 | Pressure not reported | unknown |
| Tl2Ca1Ba2Cu2O8-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 108 | Pressure not reported | unknown |
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