On the 590cm-1 B1g feature in underdoped Bi2Sr2CaCu2O8+delta

Abstract

Raman scattering studies have been performed on underdoped Bi2Sr2CaCu2O8+delta. In single crystals underdoped by oxygen removal, a 590 cm-1 peak is observed in the B1g spectrum. The feature is observed to soften in frequency by 3.8% with isotopic exchange for 16-O by 18-O. In contrast, the 590cm-1 peak is not observed in crystals underdoped by Y substitution which suggests that it correspond to a disorder induced vibrational mode. We have also found that underdoping leads to a depletion of low energy spectral weight from regions of the Fermi surface located near the Brillouin zone axes.

4 pages Latex, 4 eps figures, submitted to PRB Rapid Communication - Feb. 16, 1999

References in corpus (1)

• The pseudogap in high-temperature superconductors: an experimental survey

Cited by in corpus (6)

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• Doping dependence of the superconducting gap in Bi2Sr2CaCu2O{8 + delta}
• Unambiguous connection between the Fermi surface topology and the pseudogap in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+d}$
• Optical symmetries and anisotropic transport in high-Tc superconductors