Metal-insulator transition and superconductivity in Y1−xPrxBa2Cu3O7
Yupeng Wang, Han Rushan, Zhao-Bin Su
DOI 10.1103/PhysRevB.50.10350 · Physical Review B
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Abstract
To interpret the metal-insulator transition and the depression of Tc induced by Pr doping for the Y1−xPrxBa2Cu3O7 system, we propose a model following the Hamiltonian of Fehrenbacher and Rice for the CuO2-Pr-CuO2 subcell. In our model, the role of the reservoir hole is particularly emphasized and a scenario for the Pr-doping-dependent hole distribution is proposed. As a natural consequence, most of the experimental results on Y1−xPrxBa2Cu3O7, including the metal-insulator transition, the depression of Tc, the valence states deduced from magnetic and spectroscopic measurements, and so on, can be explained. The critical doping density of Pr takes the value of xc≊0.5.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y1-xPrxBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
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