Inhaltszusammenfassung

The analysis of several sets of data for the resistivity in Bi2Sr2CaCu2O8 x films, measured as a function of the temperature, the magnetic field, and the field orientation, allows us to show that a phase-slip-dissipation model is able to accurately describe the experimental results when the fluxon thermal fluctuations are governed by a glasslike activation law A/[T-Tg(H)], where Tg(H) is the irreversibility line. In this framework, we obtain the temperature and magnetic-field dependence of th...The analysis of several sets of data for the resistivity in Bi2Sr2CaCu2O8 x films, measured as a function of the temperature, the magnetic field, and the field orientation, allows us to show that a phase-slip-dissipation model is able to accurately describe the experimental results when the fluxon thermal fluctuations are governed by a glasslike activation law A/[T-Tg(H)], where Tg(H) is the irreversibility line. In this framework, we obtain the temperature and magnetic-field dependence of the quasi-activation-energy A. A qualitative explanation is given for the temperature and magnetic behavior in terms of a 3D-2D crossover due to the softening of the flux lines with increasing field.» weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
Physik der kondensierten Materie

DDC Sachgruppe:
Physik