Excitations in a modified Shastry-Sutherland model
文献类型：期刊论文
| 作者 | Wang, HT |
| 刊名 | EUROPEAN PHYSICAL JOURNAL B
 |
| 出版日期 | 2012 |
| 卷号 | 85期号:6 |
| 关键词 | FRUSTRATED SQUARE-LATTICE QUANTUM HEISENBERG-ANTIFERROMAGNET SPIN SYSTEM SRCU2(BO3)(2) DIMER GROUND-STATE BOUND-STATES MAGNETIZATION PLATEAUS (CUCL)LANB2O7 ORDER WAVE DISORDER |
| ISSN号 | 1434-6028 |
| 通讯作者 | Wang, HT: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | A modified Shastry-Sutherland model with fourth-nearest-neighbor dimerization is studied with strong coupling perturbation theory. One-triplet excitations are calculated up to the second order. Bose-Einstein condensation of one-triplet excitations may induce different ordered states, i.e. collinear anti-ferromagnetic state, Neel state or incommensurate state when the gap closes by changing the physical parameters or by an external magnetic field. Two-triplet bound states in the S = 1 and S = 2 channels are shown to exist around the symmetric lines of K-x = +/- K-y and K-x +/- K-y = +/-pi. For ferromagnetic dimer-dimer interaction, the energies of the bound states in the S = 1 (S = 2) channel lie above (below) the two-triplet continuum. By calculating the existence region, the degeneracy, the symmetry and the dispersion relation, a whole image and main features of the bound states are obtained. Experimental results of (CuX)LaNb2O7 with X = Cl, Br are interpreted. |
| 收录类别 | SCI |
| 资助信息 | Natural Science Foundation of China; 973-project [2010CB922904, 2011CB921500] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/37738]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wang, HT. Excitations in a modified Shastry-Sutherland model[J]. EUROPEAN PHYSICAL JOURNAL B,2012,85(6). |
| APA | Wang, HT.(2012).Excitations in a modified Shastry-Sutherland model.EUROPEAN PHYSICAL JOURNAL B,85(6). |
| MLA | Wang, HT."Excitations in a modified Shastry-Sutherland model".EUROPEAN PHYSICAL JOURNAL B 85.6(2012). |
入库方式： OAI收割
来源：物理研究所
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