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Optical study of the metal-insulator transition in CuIr2S4 crystals
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.
2004
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号69期号:15页码:-
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.
部门归属Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China; Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China; Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Chinese Acad Sci, Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China; Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
关键词Thiospinel Cuir2s4 System Superconductivity Cu1-xznxir2s4 Conduction Magnetite
学科领域Physics
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收录类别SCI
WOS记录号WOS:000221426800004
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被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14101
专题理论物理所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.
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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):-.
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