Voltage jumps in current-voltage characteristics of Bi2Sr2CaCu2O8 δ superconducting films : evidence for flux-flow instability under the influence of self-heating
Physical review B. Bd. 57. H. 2. 1998 S. R736 - R739
Erscheinungsjahr: 1998
ISBN/ISSN: 1095-3795 ; 1550-235X ; 1098-0121
Publikationstyp: Zeitschriftenaufsatz
Sprache: Englisch
Doi/URN: 10.1103/PhysRevB.57.R736
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Inhaltszusammenfassung
We present the observation of voltage jumps at high flux-flow velocities in current-voltage characteristics of c-axis-oriented Bi2Sr2CaCu2O8 ? 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 i...We present the observation of voltage jumps at high flux-flow velocities in current-voltage characteristics of c-axis-oriented Bi2Sr2CaCu2O8 ? 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/?in and the diffusion length le of the quasiparticles have also been extracted.» weiterlesen» einklappen
Klassifikation
DFG Fachgebiet:
Physik der kondensierten Materie
DDC Sachgruppe:
Physik
