Low-energy properties of anisotropic two-dimensional spin-1/2 Heisenberg models in staggered magnetic fields
文献类型：期刊论文
| 作者 | Xi, B ; Hu, SJ ; Zhao, JZ ; Su, G ; Normand, B ; Wang, XQ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 84期号:13页码:134407 |
| 关键词 | DIMENSIONAL S=1/2 ANTIFERROMAGNET CU BENZOATE INDUCED GAP COPPER BENZOATE CHAINS SYSTEMS EXCITATION YB4AS3 ESR |
| ISSN号 | 1098-0121 |
| 通讯作者 | Xi, B (reprint author), Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China. |
| 英文摘要 | We present a systematic study of the anisotropic spin-1/2 Heisenberg model in staggered magnetic fields in two dimensions. To mimic real materials, we consider a system of coupled, antiferromagnetic chains, whose interchain interaction can be either ferro-or antiferromagnetic. When the staggered field is commensurate with the magnetic interactions, an energy gap opens immediately and follows a power law as a function of the applied field, similar to the situation in one dimension. When the field competes with the interactions, a quantum phase transition (QPT) occurs from a gapless, magnetically ordered phase at low fields to a gapped, disordered regime. We use a continuous-time Monte Carlo method to compute the staggered moment of the ordered phases and the spin gap of the disordered phases. We deduce the phase diagrams as functions of the anisotropy ratio and the applied field, and calculate the scaling behavior of the models in both quantities. We show that in the competitive case, the staggered field acts to maintain a regime of quasi-1D behavior around the QPT, and we discuss as a consequence the nature of the crossover from one-dimensional (1D) to 2D physics. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | Japan Society for the Promotion of Science; National Science Foundation of China [10874244]; Chinese Ministry of Science and Technology [2007CB925001]; Chinese Ministry of Education |
| 原文出处 | http://dx.doi.org/10.1103/PhysRevB.84.134407 |
| 语种 | 英语 |
| WOS记录号 | WOS:000295793900006 |
| 公开日期 | 2013-05-17 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/14257]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Xi, B,Hu, SJ,Zhao, JZ,et al. Low-energy properties of anisotropic two-dimensional spin-1/2 Heisenberg models in staggered magnetic fields[J]. PHYSICAL REVIEW B,2011,84(13):134407. |
| APA | Xi, B,Hu, SJ,Zhao, JZ,Su, G,Normand, B,&Wang, XQ.(2011).Low-energy properties of anisotropic two-dimensional spin-1/2 Heisenberg models in staggered magnetic fields.PHYSICAL REVIEW B,84(13),134407. |
| MLA | Xi, B,et al."Low-energy properties of anisotropic two-dimensional spin-1/2 Heisenberg models in staggered magnetic fields".PHYSICAL REVIEW B 84.13(2011):134407. |
入库方式： OAI收割
来源：理论物理研究所
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