Physics – Condensed Matter – Superconductivity
Scientific paper
2005-03-31
Phys. Rev. B 72, 144503 (2005)
Physics
Condensed Matter
Superconductivity
ReVTeX, 9 pages, 8 encapsulated postscript figures, several typo's corrected
Scientific paper
10.1103/PhysRevB.72.144503
We present a detailed analysis of the superconductivity-induced redistribution of optical spectral weight in Bi2Sr2CaCu2O8 near optimal doping. It confirms the previous conclusion by Molegraaf et al. (Science 66, 2239 (2002)), that the integrated low-frequency spectral weight shows an extra increase below Tc. Since the region, where the change of the integrated spectral weight is not compensated, extends well above 2.5 eV, this transfer is caused by the transfer of spectral weight from interband to intraband region and only partially by the narrowing of the intraband peak. We show that the opposite assertion by Boris et al. (Science 304, 708 (2004)) regarding this compound, is unlikely the consequence of any obvious discrepancies between the actual experimental data.
Carbone Fabrizio
der Marel Dirk van
Kuzmenko Alexey B.
Molegraaf H. J. A.
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