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- W2013809270 abstract "Abstract Raman scattering experiments have been carried out on single crystals of underdoped YBa 2 Cu 3 O 6.5 and optimally doped YBa 2 Cu 3 O 6.95 . The B 2g spectra of the underdoped samples are comparable in strength to those from optimally doped compounds while the B 1g continua in the underdoped samples are much weaker than they are in optimally doped compounds. The loss of spectral weight in the B 1g channel in the underdoped compounds may be associated with the presence of a normal state pseudogap which masks the transition to the superconducting state. There is however, no definitive indication in the spectra of either an onset temperature T *, or a feature that could be used to estimate an upper energy limit, or gap energy, for the spectral weight depletion. Assuming weighted distributions for the degree of depletion a simple model is used to calculate a schematic representation of the spectra in the B 1g and B 2g channels. The results imply that the observed spectral weight depletion is localized to Fermi surface regions near the ( π , 0) points of the Brillouin zone." @default.
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- W2013809270 date "1998-10-01" @default.
- W2013809270 modified "2023-09-23" @default.
- W2013809270 title "Manifestation of a pseudogap in the raman spectra of underdoped YBa2Cu3O6.5?" @default.
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- W2013809270 doi "https://doi.org/10.1016/s0022-3697(98)00151-6" @default.
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