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Evidence for decay of spin waves above the pseudogap of underdoped YBa2Cu3O6.35
(American Physical Society, 2007-05-01)
The magnetic spectrum at high energies in heavily underdoped YBa2Cu3O6.35 (Tc=18 K) has been determined throughout the Brillouin zone. At low energy, the scattering forms a cone of spin excitations emanating from the ...