中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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; Wang, NL , Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China.
刊名PHYSICAL REVIEW B
出版日期2004
卷号69期号:15页码:-
关键词Thiospinel Cuir2s4 System Superconductivity Cu1-xznxir2s4 Conduction Magnetite
ISSN号1098-0121
英文摘要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.
学科主题Physics
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WOS记录号WOS:000221426800004
公开日期2012-08-30
源URL[http://ir.itp.ac.cn/handle/311006/14101]  
专题理论物理研究所_理论物理所1978-2010年知识产出
通讯作者Wang, NL , Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China.
推荐引用方式
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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.,...&Wang, NL , Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China..(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:理论物理研究所

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