A NONLINEAR SPIN-WAVE THEORY OF QUASI-2D QUANTUM HEISENBERG ANTIFERROMAGNETS
文献类型：期刊论文
| 作者 | LIU, BG |
| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
 |
| 出版日期 | 1992 |
| 卷号 | 4期号:43页码:8339 |
| 关键词 | MAGNETIC EXCITATIONS NEUTRON-SCATTERING DOPED LA2CUO4 FLUCTUATIONS SUPERCONDUCTIVITY YBA2CU3O6+X DYNAMICS MODEL CU |
| ISSN号 | 0953-8984 |
| 通讯作者 | LIU, BG: CHINA CTR ADV SCI & TECHNOL,WORLD LAB,CTR THEORET PHYS,POB 8730,BEIJING 100080,PEOPLES R CHINA. |
| 中文摘要 | Based on the Hartree-Fock approximation we propose a non-linear spin-wave theory of anisotropic 3D (or quasi-2D) quantum Heisenberg antiferromagnets, which reduces to the known spin-wave theories of isotropy when our anisotropy parameter delta takes special values. In the Hartree-Fock approximation the Dyson-transformed Hamiltonian is equivalent to the Holstein-Primakoff-transformed Hamiltonian truncated up to quartic operator terms. The spin-wave lifetime is obtained in the first-order approximation. For very small delta, the Neel temperature T(N) is much smaller.than the coupling constant J, in contrast with T(N) approximately J in the 3D isotropic case, so that our non-linear anisotropic spin-wave theory is suitable for a description of the ordering phase as well as the paramagnetic phase (up to J) of layer-like antiferromagnets. Applied to the antiferromagnetism of the cuprate La2CuO4, our quasi-2D non-linear spin-wave theory describes quite satisfactorily the existing experimental data of the Neel transition temperature, the correlation length above the Neel temperature, and staggered magnetization of the material if J = 1034 K and the anisotropy parameter is se to be 4 x 10(-5). |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/33114]  |
| 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 | LIU, BG. A NONLINEAR SPIN-WAVE THEORY OF QUASI-2D QUANTUM HEISENBERG ANTIFERROMAGNETS[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,1992,4(43):8339. |
| APA | LIU, BG.(1992).A NONLINEAR SPIN-WAVE THEORY OF QUASI-2D QUANTUM HEISENBERG ANTIFERROMAGNETS.JOURNAL OF PHYSICS-CONDENSED MATTER,4(43),8339. |
| MLA | LIU, BG."A NONLINEAR SPIN-WAVE THEORY OF QUASI-2D QUANTUM HEISENBERG ANTIFERROMAGNETS".JOURNAL OF PHYSICS-CONDENSED MATTER 4.43(1992):8339. |
入库方式： OAI收割
来源：物理研究所
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