ON THE QUANTUM KAGOME ANTIFERROMAGNET

被引：9

作者：

ASAKAWA, H

SUZUKI, M

机构：

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 1995年 / 9卷 / 08期

关键词：

D O I：

10.1142/S0217979295000367

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The purpose of the present paper is to review investigations of the antiferromagnetic Heisenberg model on the kagome lattice and to propose some schemes based on the spin-wave theory by which physical properties of the present model can be better understood. By means of our schemes, it is shown that the linear-spin-wave fiat mode of the present model comes from the semi-local symmetry of the linear-spin-wave Hamiltonian, where the flat mode has an excitation-spectrum with omega = 0 for all k. It is also shown that the inclusion of higher-order quantum fluctuations may break the symmetry and thereby the hat mode may be lifted up.

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页码：933 / 959

页数：27

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