Physics – Condensed Matter – Superconductivity
Scientific paper
2005-03-31
Physics
Condensed Matter
Superconductivity
4 pages, 2 figures
Scientific paper
Recently, A. V. Boris and colleagues claimed to deduce a decrease of intraband spectral weight (SW), and a transfer of SW from intraband to inter-band frequencies, when optimally-doped or slightly underdoped cuprates become superconducting [A. V. Boris et al., Science 304, p. 708 (2004)]. We show that, while their data agree with others [H. J. A. Molegraaf et al., Science 295, p. 2239 (2002) ; A.F. Santander-Syro et al., Europhys.Lett 62, p. 568 (2003)], their analysis is flawed. They cannot disprove the results which yield a superconductivity-induced increase of intraband SW, and a transfer of SW from high to low frequencies, in underdoped or nearly optimally doped Bi-2212.
Bontemps Nicole
Santander-Syro Andres F.
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