Dissipation in high-temperature superconductors: From short- to long-range percolative order
Mladen Prester, Željko Marohnić
DOI 10.1103/PhysRevB.51.12861 · Physical Review B
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Abstract
We studied the onset of dissipation in polycrystalline high-Tc superconductors by the use of high-resolution I-V and I-dV/dI measurements. Universal features of the nonlinear I-V characteristics have been related to the critical exponents t and s of percolation theory and to the percolation threshold concentration which in our model underlies the concept of critical current. The model allows a determination of the conductivity exponent t from a single characteristic and gives, as an experimental result, t=1.95.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BiPb)2Sr2Ca2Cu3O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| GdBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7-δ 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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