Midgap states in antiferromagnetic Heisenberg chains with a staggered field
文献类型：期刊论文
| 作者 | Lou, JZ; Chen, CF; Zhao, JZ; Wang, XQ; Xiang, T ; Su, ZB; Yu, L; Chen, CF , Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA.
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| 刊名 | PHYSICAL REVIEW LETTERS
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| 出版日期 | 2005 |
| 卷号 | 94期号:21页码:- |
| 关键词 | Dimensional S=1/2 Antiferromagnet Quantum Spin Chains Copper Benzoate Induced Gap Renormalization-group Weak Ferromagnetism Magnetic-field Yb4as3 |
| ISSN号 | 0031-9007 |
| 英文摘要 | We study low-energy excitations in antiferromagnetic Heisenberg chains with a staggered field which splits the spectrum into a longitudinal and a transverse branch. Bound states are found to exist inside the field induced gap in both branches. They originate from the edge effects and are inherent to spin-chain materials. The sine-Gordon scaling h(s)(2/3)\logh(s)\(1/6) (h(s), the staggered field) provides an accurate description for the gap and midgap energies in the transverse branch for S=1/2 and the midgap energies in both branches for S=3/2 over a wide range of magnetic field; however, it can fit other low-energy excitations only at much lower field. Moreover, the integer-spin S=1 chain displays scaling behavior that does not fit this scaling law. These results reveal intriguing features of magnetic excitations in spin-chain materials that deserve further investigation. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000229543900044 |
| 公开日期 | 2012-08-30 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13800]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Chen, CF , Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA. |
| 推荐引用方式 GB/T 7714 | Lou, JZ,Chen, CF,Zhao, JZ,et al. Midgap states in antiferromagnetic Heisenberg chains with a staggered field[J]. PHYSICAL REVIEW LETTERS,2005,94(21):-. |
| APA | Lou, JZ.,Chen, CF.,Zhao, JZ.,Wang, XQ.,Xiang, T.,...&Chen, CF , Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA..(2005).Midgap states in antiferromagnetic Heisenberg chains with a staggered field.PHYSICAL REVIEW LETTERS,94(21),-. |
| MLA | Lou, JZ,et al."Midgap states in antiferromagnetic Heisenberg chains with a staggered field".PHYSICAL REVIEW LETTERS 94.21(2005):-. |
入库方式： OAI收割
来源：理论物理研究所
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