Interlayer Josephson coupling of thermally excited vortices in Bi2Sr2CaCu2O8−y
Y. M. Wan, S. E. Hebboul, D. C. Harris, J. C. Garland
DOI 10.1103/PhysRevLett.71.157 · Physical Review Letters
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Abstract
Measurements of the zero-field resistive transition of Bi2Sr2CaCu2O8 single crystals suggest that a bulk zero-resistance state develops through a sequential process characterized by two transition temperatures. The upper transition corresponds to Josephson coupling of parallel CuO bilayers, and the lower transition to the conventional Kosterlitz-Thouless dissociation of bound vortex excitations. Measurements using a ‘‘flux transformer’’ electrode geometry indicate a pronounced peak in the secondary voltage, which is suppressed by an external magnetic field.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86.4 | Pressure not reported | zero_resistance |
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