Coupled Solitons in Alternating Heisenberg Ferromagnetic Chains with a Small Magnon Band Gap

• 来源期刊: 中国物理快报
• 学科: 物理学
• 年，卷（期）: 2001,（10）
• 所属期刊栏目: GENERAL
• 页码范围: 1316-1318
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

The coupled soliton excitations in an alternating Heisenberg ferromagnetic chain with a small magnon band gap are considered. Based on a quasi-discrete multiple scale approach, a set of coupled mode equations is derived which describes the dynamics of strongly coupled acoustic upper cut-off and optical lower cut-off modes. Coupled magnetic band gap soliton solutions are explicitly provided and their frequency properties are discussed.