MAGNON DISPERSION CURVE OF ANTIFERROMAGNETIC BI2CUO4

被引：26

作者：

AIN, M ^{[1
]}

DHALENNE, G ^{[1
]}

GUISELIN, O ^{[1
]}

HENNION, B ^{[1
]}

REVCOLEVSCHI, A ^{[1
]}

机构：

[1] UNIV PARIS 11,CHIM SOLIDE LAB,F-91405 ORSAY,FRANCE

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.47.8167

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present detailed neutron-scattering studies of the magnon dispersion curve in Bi2CuO4. We show the existence of a single doubly degenerate dispersion branch. In this antiferromagnetic S = 1/2 system, we found that our experimental results are totally accounted for by a model of four superexchange interactions: J1 = 2.2 +/- 0.15; J2 = 0.7 +/- 0.05; J3 = 0.2 +/- 0.05; J4 = 0.8 +/- 0.05; and anisotropy constant D = 0.3 +/- 0.05 in meV. These Cu-Cu interactions are similar to those between the two CuO2 planes of the so-called bilayer of YBa2Cu3O6+x, and this work is a direct determination of such couplings in copper oxides.

引用

页码：8167 / 8171

页数：5

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