Mixed Heisenberg chains .1. The ground-state problem

被引:81
|
作者
Niggemann, H
Uimin, G
Zittartz, J
机构
[1] Inst. für Theoretische Physik, Universität zu Köln, D-50937 Köln
[2] Landau Inst. for Theoretical Physics, Chernogolovka
关键词
D O I
10.1088/0953-8984/9/42/017
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We consider a mechanism for competing interactions in alternating Heisenberg spin chains due to the formation of local spin-singlet pairs. The competition of spin-1 and spin-0 states reveals hidden Ising symmetry of such alternating chains.
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页码:9031 / 9042
页数:12
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