Superconducting critical current of a single Cu2O4 plane in a Bi2Sr2CaCu2O8+x single crystal
L. X. You, A. Yurgens, D. Winkler
DOI 10.1103/PhysRevB.71.224501 · Physical Review B
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Abstract
By feeding current into the topmost Cu2O4 layer of a mesa etched into the surface of a Bi2Sr2CaCu2O8+x (BSCCO) single crystal, we measured its superconducting critical value from a sharp upturn or break in the current-voltage characteristics of the mesa. From this, we estimate the sheet critical current density of a single Cu2O4 plane to be ∼0.3–0.7A∕cm at 4.5K, corresponding to the bulk current density of 2–5MA∕cm2. These values are among the largest ever measured for BSCCO single crystals, thin films and tapes, and we argue that they represent the true intrinsic values of the material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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