Carrier-density-related superconductivity in bismuth cuprates
M. Rateau, R. Suryanarayanan, O. Gorochov, H. Pankowska
DOI 10.1103/PhysRevB.41.857 · Physical Review B
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Abstract
We report Hall-constant (RH) measurements on the Bi-Sr-Ca-Cu-O system. Two systems, 2:2:1:2 and 2:2:2:3, have been studied with a variety of heat treatments and cationic substitutions (Pb, Gd, Nd, Sm). The carrier density (n=1/eRH) at 300 K as a function of Tc for these polycrystalline samples show two distinct maxima—one corresponding to the low-Tc (2:2:1:2) phase and the other to the high-Tc (2:2:2:3) phase. The data point to compelling evidence of correlations between charge carriers and superconductivity confirming similar Hall data on Y- and La-based cuprates. A discussion of some relevant models is presented.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi1.6Pb0.4Sr2Ca2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 107 | Pressure not reported | zero_resistance |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Nd2-xCexCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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