ENERGY VERSUS MAGNETIC-FIELD DIAGRAM OF THE SPIN-1 HALDANE SYSTEM WITH AN IMPURITY

被引：2

作者：

KABURAGI, M ^{[1
]}

TONEGAWA, T ^{[1
]}

机构：

[1] KOBE UNIV,DEPT PHYS,KOBE 657,JAPAN

来源：

PHYSICA B | 1994年 / 201卷

关键词：

D O I：

10.1016/0921-4526(94)91081-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Energy versus magnetic field diagram of the spin-1 Haldane system with an impurity bond is studied in terms of spin-1/2 degrees of freedom at the sites neighboring the impurity bond by means of an analytical method. We examine the equivalence between a phenomenological Hamiltonian of two coupled spin-1/2 spins representing the spin-1/2 degrees of freedom and a more realistic Hamiltonian. It is shown that when the strength of the impurity bond is sufficiently weak, the two Hamiltonians are equivalent to each other, as far as the energies of low-lying states are concerned.

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页码：192 / 195

页数：4

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