Inhaltszusammenfassung

Recent experimental results obtained from transport measurements on extremely long measurement bridges [1] have questioned the validity of previous vortex-glass analyses. For electric-field windows restricted to relatively high values of E > 10?5 V/m the dynamic exponent of the vortex-glass transition z ? 6, in agreement with theoretical predictions and previous experimental results. However, for extended windows (10?1 ? E ? 10?8 V/m) ? while the characteristics of a vortex-glass transition a...Recent experimental results obtained from transport measurements on extremely long measurement bridges [1] have questioned the validity of previous vortex-glass analyses. For electric-field windows restricted to relatively high values of E > 10?5 V/m the dynamic exponent of the vortex-glass transition z ? 6, in agreement with theoretical predictions and previous experimental results. However, for extended windows (10?1 ? E ? 10?8 V/m) ? while the characteristics of a vortex-glass transition are preserved ? all analyses result in z ? 9. A combined analysis of the crossover-current density J 0 and crossover-electric field E 0, which limit the critical regime of the vortex-glass transition, allows a conclusive determination of z depending primarily on higher electric-field data. » weiterlesen» einklappen

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Klassifikation

DFG Fachgebiet:
Physik der kondensierten Materie

DDC Sachgruppe:
Physik