Weak pseudogap in crystals of Pb2Sr2(Y,Ca)Cu3O8+d

Details Weak pseudogap in crystals of Pb2Sr2(Y,Ca)Cu3O8+d Weak pseudogap in crystals of Pb2Sr2(Y,Ca)Cu3O8+d

1997-03-08

arxiv.org/abs/cond-mat/9703083v1

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures, submitted to PRB

Scientific paper

10.1103/PhysRevB.56.R8511

We report on NMR measurements in underdoped Pb2Sr2(Y,Ca)Cu3O8+d crystals. A pseudogap is observed in the Knight shift and spin-lattice relaxation rate. 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 contrast between weak and strong pseudogaps is discussed.

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