Phase diagram for the spin pseudogap in LaBa2Cu3Oy studied by NMR

被引：11

作者：

Goto, A ^{[1
]}

Yasuoka, H ^{[1
]}

Otzschi, K ^{[1
]}

Ueda, Y ^{[1
]}

机构：

[1] UNIV TOKYO, INST SOLID STATE PHYS, MINATO KU, TOKYO 106, JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.55.12736

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The carrier concentration dependence of the spin pseudogap phenomenon in LaBa2Cu3Oy has been studied by means of the NMR/NQR method. From the T dependence of 1/T1T 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-c) is realized as a function of hole doping. This feature is quite different from that in YBa2Cu3Oy, 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-2G and Knight shift data, the nature of the gap is discussed.

引用

页码：12736 / 12741

页数：6

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