Annealing effect on the electron-doped superconductor Pr0.88LaCe0.12CuO4±δ
Yong-Lei Wang, Yan Huang, Lei Shan, S. L. Li, Pengcheng Dai, Cong Ren, Hai-Hu Wen
DOI 10.1103/PhysRevB.80.094513 · Physical Review B
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Abstract
Using high-vacuum annealing treatment, the superconducting transition temperature Tc of the electron-doped Pr0.88LaCe0.12CuO4±δ single crystals was successfully driven to a regime in which the Tc value continuously decreases with oxygen removal. This regime of oxygen-reduction process is hard to be understood according to the previous knowledge of this material. In addition, a remarkable relaxation of Tc over time was observed at room temperature, indicating that the variation in Tc is closely related to the rearrangement of oxygen in the sample. In combination with previous studies, it can be concluded that, in the whole process of oxygen reduction applied on Pr0.88LaCe0.12CuO4±δ, although the strength of antiferromagnetic (fluctuation) correlations does play a role, Tc is dominated by the disorder effect of CuO2 plane either on copper sites or oxygen sites, which leads to a strong depairing effect.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr0.88LaCe0.12CuO4±δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25.9 | Pressure not reported | onset |
| Pr0.88LaCe0.12CuO4±δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 23 | Pressure not reported | onset |
| Pr0.88LaCe0.12CuO4±δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 23.2 | Pressure not reported | onset |
| Nd2-xCexCuO4±δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Pr2-xCexCuO4±δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7-δ 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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