Phonon softening and forbidden mode in Na(0.5)CoO(2) observed by Raman scattering
文献类型：期刊论文
| 作者 | Zhang, QM ; An, M ; Yuan, SK ; Wu, Y ; Wu, D ; Luo, JL ; Wang, NL ; Bao, W ; Wang, YN |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2008 |
| 卷号 | 77期号:4 |
| ISSN号 | 1098-0121 |
| 中文摘要 | The structural changes associated with the charge ordering (CO) transition in layered La(0.5)Sr(1.5)MnO(4) have been determined by electron diffraction using the multislice least-squares method. The results demonstrate that the structural deformations of the Mn(3+)O(6) octahedra can be well characterized by a transverse modulation wave along the < 110 > direction. Based on these structural data, we have performed a theoretical calculation of the electronic structure by density functional theory plus the on-site Coulomb interaction U. The resultant density of states exhibits a clear band gap at the Fermi level for this low-temperature CO insulating state. It is also noted that the essential Jahn-Teller effects in this layered system can evidently affect the electronic structures and orbital hybridization appearing with the CO transition. Charge disproportionation and orbital ordering in La(0.5)Sr(1.5)MnO(4) have been extensively discussed in comparison with the data obtained for the cubic perovskite La(0.5)Ca(0.5)MnO(3). |
| 收录类别 | SCI |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/50884]  |
| 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 | Zhang, QM,An, M,Yuan, SK,et al. Phonon softening and forbidden mode in Na(0.5)CoO(2) observed by Raman scattering[J]. PHYSICAL REVIEW B,2008,77(4). |
| APA | Zhang, QM.,An, M.,Yuan, SK.,Wu, Y.,Wu, D.,...&Wang, YN.(2008).Phonon softening and forbidden mode in Na(0.5)CoO(2) observed by Raman scattering.PHYSICAL REVIEW B,77(4). |
| MLA | Zhang, QM,et al."Phonon softening and forbidden mode in Na(0.5)CoO(2) observed by Raman scattering".PHYSICAL REVIEW B 77.4(2008). |
入库方式： OAI收割
来源：物理研究所
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