Exchange distortion and spin Jahn-Teller effect for triangular and tetrahedral spin clusters of spin-1/2

被引：1

作者：

Terao, Kiyosi ^{[1
]}

Honda, Ikumi

机构：

[1] Shinshu Univ, Fac Sci, Matsumoto, Nagano 3908621, Japan

[2] Shinshu Univ, Grad Sch Sci & Technol, Matsumoto, Nagano 3908621, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

关键词：

spin Jahn-Teller effect; exchange striction; quantum spin; vanadium spinel;

D O I：

10.1016/j.jmmm.2006.10.397

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the effects of magneto-elastic coupling on the degenerate ground state of the antiferromagnetic Heisenberg model on regular triangle and tetrahedron clusters of spin-1/2.. Both give very similar results because of the characteristics of their symmetry. Quantum-mechanical distortion appears through fluctuation of normal modes and the degeneracy of the ground state is not lifted. The tetragonal distortion at the non-magnetic phase transition of vanadium spinels is discussed, (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1377 / 1379

页数：3

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