Macroscopic quantum phenomena in high-Tc superconducting material
A. Th. A. M. de Waele, R. T. M. Smokers, R. W. van der Heijden, K. Kadowaki, Y. K. Huang, M. van Sprang, A. A. Menovsky
DOI 10.1103/PhysRevB.35.8858 · Physical Review B
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Abstract
The observation of macroscopic quantum phenomena in a high-Tc superconducting material [YBa2Cu3O9−y (Y-Bu-Cu-O), Tc=93.4 K] is reported. Relationships between current, voltage, and magnetic fields of Sn–Y-Ba-Cu-O and Y-Ba-Cu-O–Y-Ba-Cu-O point contracts were measured. In both cases the critical current is periodic in the magnetic field, which is typical for double point contacts (dc superconducting quantum interference devices). In the Sn–Y-Ba-Cu-O contacts the oscillations were observed below the Tc of tin. In the Y-Ba-Cu-O–Y-Ba-Cu-O contacts the oscillations were observed at temperatures up to 66 K, clearly demonstrating macroscopic quantum phemonena in this high-Tc material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O9-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.4 | Pressure not reported | unknown |
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