Evidence of charge carrier interaction above Tc in the Nd1.85Ce0.15CuO4+δ superconductor
M. Scavini, P. Ghigna, G. Spinolo, U. Anselmi Tamburini, G. Chiodelli, G. Flor, A. Lascialfari, S. De Gennaro
DOI 10.1103/PhysRevB.58.9385 · Physical Review B
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Abstract
Resistivity, thermopower, and magnetic susceptibility of the Nd1.85Ce0.15CuO4+δ n-type superconductor have been measured on samples with well-known charge carrier density. Superconductivity is achieved only for charge carrier densities greater than a threshold value. When this value is approached, mobility drops to less than a tenth of the value for nonsuperconducting samples, the effective mass increases from 8me to 25me, and susceptibility falls to lower values. All these phenomena are apparent well above Tc, thus indicating a charge carrier interaction above Tc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nd1.85Ce0.15CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21 | Pressure not reported | onset |
| Nd1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21 | Pressure not reported | onset |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Tl2Ba2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| TlBa2CaCu2O7 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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