Depression and broadening of the superconducting transition in superlattices based on YBa2Cu3O7−δ: Influence of the barrier layers
David P. Norton, Douglas H. Lowndes, S. J. Pennycook, J. D. Budai
DOI 10.1103/PhysRevLett.67.1358 · Physical Review Letters
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Abstract
The superconducting properties of YBa2Cu3O7−δ-based superlattices are shown to depend strongly on the electronic properties of the barrier layers. The resistive transition width decreases significantly as the hole carrier density in the barrier layers is increased. However, Tc(onset) does not change, contrary to predictions of hole-filling models. Tc(onset) is apparently determined by the YBa2Cu3O7−δ layer thickness, while the transition width, determined by long-range phase coherence of the superconducting wave function, depends on the electronic properties of the isolating barrier layers.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 19 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 54 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 50 | Pressure not reported | zero_resistance |
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