Multimagnon bound states in the frustrated ferromagnetic one-dimensional chain

被引：116

作者：

Kecke, Lars ^{[1
]}

Momoi, Tsutomu ^{[1
]}

Furusaki, Akira ^{[1
]}

机构：

[1] RIKEN, Condensed Matter Theory Lab, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.76.060407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study a one-dimensional Heisenberg chain with competing ferromagnetic nearest-neighbor and antiferromagnetic next-nearest-neighbor interactions in a magnetic field. Starting from the fully polarized high-field state, we calculate the dispersions of the lowest-lying n-magnon excitations and the saturation field (n=2,3,4). We show that the lowest-lying excitations are always bound multimagnon states with a total momentum of pi except for a small parameter range. We argue that Bose condensation of the bound n magnons leads to novel Tomonaga-Luttinger liquids with multipolar correlations; nematic- and triatic-ordered liquids correspond to n=2 and n=3.

引用

页数：4

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