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Voltage jumps in current-voltage characteristics of Bi2Sr2CaCu2O8 ? superconducting films: Evidence for flux-flow instability under the influence of self-heating

Phys. Rev. B. Bd. 57. 1998 S. 736 - 739

Erscheinungsjahr: 1998

Publikationstyp: Zeitschriftenaufsatz (Forschungsbericht)

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

Autoren


Xiao, Z.L. (Autor)
Voss-de Haan, P. (Autor)
Jakob, G. (Autor)

Klassifikation


DFG Fachgebiet:
Physik der kondensierten Materie

DDC Sachgruppe:
Physik

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