Physics – Condensed Matter – Superconductivity
Scientific paper
2006-12-13
Physics
Condensed Matter
Superconductivity
3 pages, 1 figure
Scientific paper
In a recent letter [1] Pilgram, Rice and Sigrist (PRS) propose to perform oxygen isotope dependent conductivity measurements along the c-axis of the cuprate superconductor BSSCO. In Raman isotope data for vibrations along the c-axis from 1988 [2], and in site selective susceptibility experiments determining Tc, no isotope effects were observed for oxygen ions in the insulating layer [3]. Based on these earlier not by PRS quoted experiments, we argue that the suggestion made in Ref. 1 is not worth to be undertaken, and if it is carried through, no effect will be seen. From the meanwhile 12 years old site selective data [3] the observed isotope effects stem to nearly 100% from oxygen ions in the CuO2-planes. These results evidence polaronic behavior in these planes [4].
Bishop Alan R.
Bussmann-Holder Annette
Conradson Steven D.
Dolgov O.
Kamimura Hiroshi
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