Optical study of the metal-insulator transition in CuIr2S4 crystals
文献类型：期刊论文
| 作者 | Wang, NL ; Cao, GH ; Zheng, P ; Li, G ; Fang, Z ; Xiang, T ; Kitazawa, H ; Matsumoto, T |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2004 |
| 卷号 | 69期号:15 |
| 关键词 | THIOSPINEL CUIR2S4 SYSTEM SUPERCONDUCTIVITY CU1-XZNXIR2S4 CONDUCTION MAGNETITE |
| ISSN号 | 1098-0121 |
| 通讯作者 | Wang, NL (reprint author), Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | We present measurements of the optical spectra on single crystals of spinel-type compound CuIr2S4. This material undergoes a sharp metal-insulator transition at 230 K. Upon entering the insulating state, the optical conductivity shows an abrupt spectral weight transfer and an optical excitation gap opens. In the metallic phase, Drude components in low frequencies and an interband transition peak at similar to2 eV are observed. In the insulating phase, a peak emerges around 0.5 eV. This peak is attributed to the transition of electrons from the occupied Ir3+ t(2g) state to upper Ir4+ t(2g) subband resulting from the dimerization of Ir4+ ions in association with the simultaneous formations of Ir3+ and Ir4+ octamers as recently revealed by the x-ray-diffraction- experiment. Our experiments indicate that the band structure is reconstructed in the insulating phase due to the sudden structural transition. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/50366]  |
| 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, NL,Cao, GH,Zheng, P,et al. Optical study of the metal-insulator transition in CuIr2S4 crystals[J]. PHYSICAL REVIEW B,2004,69(15). |
| APA | Wang, NL.,Cao, GH.,Zheng, P.,Li, G.,Fang, Z.,...&Matsumoto, T.(2004).Optical study of the metal-insulator transition in CuIr2S4 crystals.PHYSICAL REVIEW B,69(15). |
| MLA | Wang, NL,et al."Optical study of the metal-insulator transition in CuIr2S4 crystals".PHYSICAL REVIEW B 69.15(2004). |
入库方式： OAI收割
来源：物理研究所
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