ORDERING DUE TO QUANTUM FLUCTUATIONS IN THE FRUSTRATED HEISENBERG-MODEL

被引：32

作者：

KUBO, K

KISHI, T

机构：

[1] Institute of Physics, University of Tsukuba

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1991年 / 60卷 / 02期

关键词：

D O I：

10.1143/JPSJ.60.567

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Heisenberg antiferromagnet with both the nearest neighbor and the next nearest neighbor interactions is studied in two and three dimensions. The spin wave excitation spectrum is obtained based on the general four sublattice mean field ground state in the region where the next nearest neighbor interactions prevail. It is shown that the continuous degeneracy of the mean field ground state is lifted by the zero-point spin wave fluctuations and the "strip" state with collinear spin ordering is stabilized.

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页码：567 / 572

页数：6

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