Voltage jumps in current-voltage characteristics of Bi2Sr2CaCu2O8+δ superconducting films: Evidence for flux-flow instability under the influence of self-heating
Z. L. Xiao, P. Voss-de Haan, G. Jakob, H. Adrian
DOI 10.1103/PhysRevB.57.R736 · Physical Review B
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Abstract
We present the observation of voltage jumps at high flux-flow velocities in current-voltage characteristics of c-axis-oriented Bi2Sr2CaCu2O8+δ superconducting thin films. The experimental results agree quantitatively with the prediction for viscous flux-flow instability including consideration of a finite heat-removal rate from the samples. We obtained a characteristic magnetic field BT, which separates the regions where the instability is dominated by nonthermal and heating mechanisms. The inelastic scattering rate 1/τin and the diffusion length le of the quasiparticles have also been extracted.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86 | Pressure not reported | midpoint |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86 | Pressure not reported | midpoint |
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