Doped coupled frustrated spin-1/2 chains with four-spin exchange -: art. no. 157202

被引：21

作者：

Laflorencie, N ^{[1
]}

Poilblanc, D ^{[1
]}

机构：

[1] Univ Toulouse 3, Phys Theor Lab, CNRS, FRE2603, F-31062 Toulouse, France

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.90.157202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The role of various magnetic interchain couplings is investigated by numerical methods in doped frustrated quantum spin chains. A nonmagnetic dopant introduced in a gapped spin chain releases a free spin-1/2 soliton. The formation of a local magnetic moment is analyzed in terms of soliton confinement. A four-spin coupling which might originate from cyclic exchange is shown to produce such a confinement. Dopants on different chains experience an effective space-extended nonfrustrating pairwise spin interaction.

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页数：4

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