Dynamical effects of phonons on soliton binding in spin-Peierls systems

被引：40

作者：

Augier, D ^{[1
]}

Poilblanc, D

Sorensen, E

Affleck, I

机构：

[1] Univ Toulouse 3, Phys Quant Lab, F-31062 Toulouse, France

[2] Univ Toulouse 3, CNRS, UMR 5626, F-31062 Toulouse, France

[3] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[4] Univ British Columbia, Canadian Inst Adv Res, Vancouver, BC V6T 1Z1, Canada

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.58.9110

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The role of dynamical magnetoelastic coupling in spin-Peierls chains is investigated by numerical and analytical techniques. We show that a Heisenberg spin chain coupled to dynamical optical phonons exhibits a transition towards a spontaneously dimerized state in a wide range of parameter space. The low-energy excitations are characterized as solitons. No binding between solitons occurs in the isolated spin-phonon chain and the dynamical spin structure factor shows a broad magnon dispersion. However, elastic interchain coupling can lead to the formation of bound states. [S0163-1829(98)09438-7].

引用

页码：9110 / 9113

页数：4

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