Phase diagram for the spin pseudogap in LaBa{sub 2}Cu{sub 3}O{sub y} studied by NMR
- Institute for Solid State Physics, University of Tokyo, Roppongi, Minato-ku, Tokyo 106 (Japan)
The carrier concentration dependence of the spin pseudogap phenomenon in LaBa{sub 2}Cu{sub 3}O{sub y} has been studied by means of the NMR/NQR method. From the T dependence of 1/T{sub 1}T of the planar Cu site, it has turned out that the characteristic temperature for the spin pseudogap at the staggered mode is a monotonic function of hole concentration in the lightly doped region. However, a spin-gap-like behavior was observed even in the optimally doped sample (y=6.96), where the maximal superconducting transition temperature (T{sub c}) is realized as a function of hole doping. This feature is quite different from that in YBa{sub 2}Cu{sub 3}O{sub y}, where the spin pseudogap is restricted to the lightly doped region and is not observed in the optimally doped sample (y=6.98). Together with 1/T{sub 2G} and Knight shift data, the nature of the gap is discussed. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 496771
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 18 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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