O-17 NMR evidence for a pseudogap in the monolayer HgBa2CuO4+delta

被引：63

作者：

Bobroff, J ^{[1
]}

Alloul, H ^{[1
]}

Mendels, P ^{[1
]}

Viallet, V ^{[1
]}

Marucco, JF ^{[1
]}

Colson, D ^{[1
]}

机构：

[1] CEA SACLAY,SERV PHYS ETAT CONDENSE,DRECAM,SPEC,F-91191 GIF SUR YVETTE,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.78.3757

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the spin shift K-17(s) have been performed for the O-17 NMR line in the monolayer cuprate HgBa2CuO4+delta, and yield the spin susceptibility chi(s)(T) of the CuO2 planes. In the underdoped regime, chi(s) is found to extrapolate to zero at T greater than or equal to 0. This indicates that a pseudogap opens at T* > T-c, as in YBa2Cu3O6.6. Therefore, the pseudogap features cannot be explained in terms of a magnetic coupling between CuO2 planes in bilayer systems. In the overdoped regime, chi(s)(T) obeys a Pauli-like law, as found in the overdoped Ti2Ba2CuO6. Comparing the different monolayer systems, we suggest some correlation between T-c and distortion effects in the planes, as monitored by the O-17 NMR linewidth.

引用

页码：3757 / 3760

页数：4

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