Physics – Condensed Matter – Superconductivity
Scientific paper
2006-06-20
Physics
Condensed Matter
Superconductivity
Submitted to Physica C (M2S-HTSC 2006 Proceedings)
Scientific paper
10.1016/j.physc.2007.03.072
We have studied the magnetic field dependence of the temperature derivative of the resistivity, dr(H,T)/dT, of a number of Y1-xCaxBa2(Cu1-yZny)3O7-d crystalline thin films over a wide range of sample compositions. From the analysis of the temperature derivative data we have been able to distinguish quite clearly between two characteristic temperature scales, (a) the onset of strong superconducting fluctuation temperature, Tscf and (b) the pseudogap temperature, TPG. Significantly different characteristic features of dr(H,T)/dT at Tscf and at TPG imply that Tscf and TPG have different physical origins.
Cooper J. R.
Islam R. S.
Naqib S. H.
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