Effects of anharmonic lattice distortion on orbital and magnetic orderings and in KcuF_3
文献类型：期刊论文
| 作者 | Liu DaYong2 ; Chen DongMeng2; Zou LiangJian2
|
| 刊名 | Chinese Physics. B
 |
| 出版日期 | 2009 |
| 卷号 | 18 |
| 关键词 | orbital ordering KCuF_3 Jahn-Teller effect anharmonic lattice distortion |
| ISSN号 | 1674-1056 |
| 其他题名 | Effects of anharmonic lattice distortion on orbital and magnetic orderings and in KcuF_3 |
| 英文摘要 | Lattice, magnetic and orbital structures in KCuF_3 are self-consistently determined by our cluster self-consistent field approach based on a spin-orbital-lattice Hamiltonian. Two stable structures are obtained and found to be degenerate, which confirms the presence of the coexistent phases observed experimentally. We clearly show that due to the inherent frustration, the ground state of the system only with the superexchange interaction is degenerate; while the Jahn-Teller distortion, especially the anharmonic effect, stabilizes the orbital ordered phase at about 23% in the x~2-y~2 or bit and at 77% in the 3z~2-r~2 orbit. Meanwhile the magnetic moment of Cu is considerably reduced to 0.56μB, and magnetic coupling strengths are highly anisotropic, J_z/J_(xy)≈18.These resets are in good agreement with the experiments, implying that the anharmonic Jahn-Teller effect plays an essential role in stabilising the orbital ordered ground state of KCuF_3. |
| 语种 | 英语 |
| CSCD记录号 | CSCD:3680960 |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/49232]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 作者单位 | 1.Institute of Solid State Physics, Chinese Academy of Sciences 2.Institute of Solid State Physics, Chinese Academy of Sciences 3.Institute of Solid State Physics, Chinese Academy of Sciences |
| 推荐引用方式 GB/T 7714 | Liu DaYong,Chen DongMeng,Zou LiangJian. Effects of anharmonic lattice distortion on orbital and magnetic orderings and in KcuF_3[J]. Chinese Physics. B,2009,18. |
| APA | Liu DaYong,Chen DongMeng,&Zou LiangJian.(2009).Effects of anharmonic lattice distortion on orbital and magnetic orderings and in KcuF_3.Chinese Physics. B,18. |
| MLA | Liu DaYong,et al."Effects of anharmonic lattice distortion on orbital and magnetic orderings and in KcuF_3".Chinese Physics. B 18(2009). |
入库方式： OAI收割
来源：合肥物质科学研究院
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