Transport mechanisms in Y1Ba2Cu3O6+δ superconductors in the metallic and the semiconducting regimes
P. P. Freitas, T. S. Plaskett
DOI 10.1103/PhysRevB.37.3657 · Physical Review B
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Abstract
We report measurements of the electrical resistivity at high temperatures for constant oxygen content, or for fixed temperature and varying oxygen content. We show that the Y1Ba2Cu3O6+δ compound changes from a metallic to a semiconducting behavior for δ≃0.5. In the semiconducting regime, the characteristic activation energy is oxygen dependent and reaches 0.37 eV for δ=0.25. In the metallic regime, the conductivity is approximately linear in the oxygen content while on the semiconducting side, excess conductivity arises from thermally activated processes.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y1Ba2Cu3O6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
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