Measurements of the real part of the resistivity at 23 and 48 GHz are performed in Bi2Sr2CaCu2O8+x thin films as a function of the temperature. The experimental behavior above Tc is analyzed in the frame of the time dependent Ginzburg-Landau theory for the excess conductivity. We show that the observed resistivity can be interpreted by the 2D gaussian theory due to the high anisotropy of tills compound. The validity of the theory is extended up to the high temperature region with the introduction of a phenomenogical cut-off on the order parameter spectrum. Approaching T-c, data deport from the predicted behavior; this departure can be ascribed either to a dimensional crossover or to the effects of interacting fluctuations.
Neri, D., Fastampa, R., Giura, M., Marcon, R., Sarti, S., Silva, E. (1999). Fluctuative conducitivity at microwave frequencies in BSCCO thin films. JOURNAL OF LOW TEMPERATURE PHYSICS, 117(5-6), 1099-1103 [10.1023/A:1022586609825].
Fluctuative conducitivity at microwave frequencies in BSCCO thin films
SILVA, Enrico
1999-01-01
Abstract
Measurements of the real part of the resistivity at 23 and 48 GHz are performed in Bi2Sr2CaCu2O8+x thin films as a function of the temperature. The experimental behavior above Tc is analyzed in the frame of the time dependent Ginzburg-Landau theory for the excess conductivity. We show that the observed resistivity can be interpreted by the 2D gaussian theory due to the high anisotropy of tills compound. The validity of the theory is extended up to the high temperature region with the introduction of a phenomenogical cut-off on the order parameter spectrum. Approaching T-c, data deport from the predicted behavior; this departure can be ascribed either to a dimensional crossover or to the effects of interacting fluctuations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
