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.2007.03.168
The effects of planar hole content, p, on the temperature-dependent uniform (q = 0) magnetic susceptibility, c(T), of polycrystalline Y1-xCaxBa2Cu3O7-d compounds with 0.0 = x = 0.20 were investigated over a wide range of oxygen deficiency (d). Systematic variations in c(T) were found with changing p. The characteristic pseudogap temperature scale, Eg(p)/kB, was extracted from the analysis of the c(T,p) data. We have found clear evidence that the pseudogap in the quasi-particle spectral weight appears abruptly at a planar hole content of p ~ 0.19, and that it grows rapidly with decreasing p.
Cooper J. R.
Naqib S. H.
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