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链间超交换相互作用下spin-Peierls梯子模型的基态行为
引用本文:刘海莲,王治国,杨成全,石云龙.链间超交换相互作用下spin-Peierls梯子模型的基态行为[J].物理学报,2006,55(7):3688-3691.
作者姓名:刘海莲  王治国  杨成全  石云龙
作者单位:(1)同济大学波耳固体物理研究所,上海 200092; (2)雁北师范学院固体物理研究所,大同 037009; (3)雁北师范学院固体物理研究所,大同 037009;同济大学波耳固体物理研究所,上海 200092
摘    要:采用Lanczos数值计算方法研究了具有链间海森堡相互作用和链间Dzyaloshinskii-Moriya(DM)相互作用spin-Peierls梯子模型的基态行为.分析了链间海森堡相互作用和链间DM相互作用对系统二聚化的影响.结果发现,这两种链间作用都不利于系统的二聚化,会造成系统基态二聚化的减小,这说明随着系统维度的增大,系统的各向相互作用会限制系统的二聚化,甚至会破坏系统的二聚化相. 关键词: spin-Peierls模型 海森堡相互作用 DM相互作用 二聚化

关 键 词:spin-Peierls模型  海森堡相互作用  DM相互作用  二聚化
文章编号:1000-3290/2006/55(07)/3688-04
收稿时间:11 14 2005 12:00AM
修稿时间:1/6/2006 12:00:00 AM

Ground state properties of spin-Peierls ladder model with interchain superexchange interactions
Liu Hai-Lian,Wang Zhi-Guo,Yang Cheng-Quan,Shi Yun-Long.Ground state properties of spin-Peierls ladder model with interchain superexchange interactions[J].Acta Physica Sinica,2006,55(7):3688-3691.
Authors:Liu Hai-Lian  Wang Zhi-Guo  Yang Cheng-Quan  Shi Yun-Long
Institution:1 Institute of Solid State Physics, Yanbei Normal College, Datong 037009, China; 2Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China
Abstract:The ground-state properties of spin-Peierls ladder model with interchain Heisenberg interaction and interchain Dzyaloshinskii-Moriya(DM)interaction are studied by Lanczos numerical method. We mainly concentrate on the influence of interchain Heisenberg interaction and interchain DM interaction on system dimerization. The results show that these two interchain interations always act against the dimerization of the system, and they can make system ground state dimerization diminishing, which means that increasing the system dimensions may reduce system dimerization, even destroy the dimerization phase.
Keywords:spin-Peierls model  Heisenberg interaction  DM interaction  dimerization
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