INVESTIGATION OF THE SPIN DYNAMICS IN YBA2CU3O6+X BY INELASTIC NEUTRON-SCATTERING

被引：345

作者：

ROSSATMIGNOD, J ^{[1
]}

REGNAULT, LP ^{[1
]}

VETTIER, C ^{[1
]}

BURLET, P ^{[1
]}

HENRY, JY ^{[1
]}

LAPERTOT, G ^{[1
]}

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

来源：

PHYSICA B | 1991年 / 169卷 / 1-4期

关键词：

D O I：

10.1016/0921-4526(91)90208-V

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Inelastic neutron scattering experiments have been carried out on YBa2Cu3O6+x single crystals to investigate the spin dynamics in the pure AF-state (x = 0.15, T(N) = 410 K), in the doped AF-state (x = 0.37, T(N) = 180 K), in the metallic weakly doped superconducting state (x = 0.45, T(c) = 37 K; x = 0.51, T(c) = 47 K) and in the T(c) = 60 K superconducting phase (x = 0.69, T(c) = 59 K). The main results are summarized: the two dimensional character of the spin-wave spectrum in the AF-stat, strong renormalization of low-energy excitations and overdamping of in-plane spin fluctuations in the doped AF-state, dynamical AF correlations in the superconducting state, evidence for a pseudo-gap induced by superconductivity and existence of superconducting correlations above T(c).

引用

页码：58 / 65

页数：8

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