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Cu NMR Study of the Pseudogap in Pb2Sr2(Y,Ca)Cu3O8+δ
並列摘要
NMR measurements on ^63Cu in underdoped Pb2Sr2(Y,Ca)Cu3O8+δxa crystals are reported. A pseudogap is observed in the Knight shift and spin-lattice relaxation rate for the planar ^63Cu. In contrast to other underdoped compounds, the pseudogap observed in the Knight shift is weak and occurs at a significantly lower temperature. On the other hand, the effect the pseudogap has on spin-lattice relaxation is quite similar to that in other compounds. The manifestation of the pseudogap at q = 0 is quite different than at q = Q.
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