Cu NMR Study of the Pseudogap in Pb2Sr2(Y,Ca)Cu3O8+δ

Ya-Wei Hsueh；B. W. Statt；M. Reedyk；J. S. Xue；J. E. Greedan

Chinese Journal of Physics

38卷2S期（2000 / 04 / 01）

350 - 353

英文

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.