SELF-CONSISTENT INTERACTION OF MAGNONS IN A FRUSTRATED QUANTUM ANTIFERROMAGNET

被引：7

作者：

BERGOMI, L

JOLICOEUR, T

机构：

来源：

JOURNAL DE PHYSIQUE I | 1992年 / 2卷 / 04期

关键词：

D O I：

10.1051/jp1:1992149

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the magnon interactions by means of a self-consistent calculation in a frustrated quantum Heisenberg antiferromagnet with first and second neighbor exchange couplings. We have used the Hartree-Fock-Bogolyubov scheme at zero temperature. The effect of frustration on the shape of the spin-wave spectrum is investigated: we find a strong decrease of the spin-wave velocity. A clear deviation from spin wave theory is found when comparing with finite lattice results.

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页码：371 / 377

页数：7

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