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题名: Intrinsic electron and hole bands in electron-doped cuprate superconductors
作者: Xiang, T. ;  Luo, H. G. ;  Lu, D. H. ;  Shen, K. M. ;  Shen, Z. X.
刊名: PHYSICAL REVIEW B
出版日期: 2009
卷号: 79, 期号:1, 页码:-
学科分类: Physics
通讯作者: Xiang, T , Chinese Acad Sci, Inst Phys, POB 603, Beijing 100190, Peoples R China
部门归属: [Xiang, T] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; [Xiang, T; Luo, HG] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Luo, HG] Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China; [Lu, DH; Shen, ZX] Stanford Univ, Dept Phys, Stanford, CA 94305 USA; [Lu, DH; Shen, ZX] Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA; [Shen, KM] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada
英文摘要: We propose that the upper Hubbard band (electronlike) and the Zhang-Rice singlet band (holelike) are two essential components in describing low-energy excitations of electron-doped cuprate superconductors. We find that the gap between these two bands is significantly smaller than the charge-transfer gap measured by optics and is further reduced upon doping. This indicates that the charge fluctuation is strong and the system is in the intermediate correlation regime. A two-band model is derived. In the limit that the intraband and interband hopping integrals are equal to each other, this model is equivalent to the unconstrained t-J model with on-site Coulomb repulsions.
资助者: NSFC; Office of Science, Division of Materials Science, DOE[DE-AC02-76SF00515]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000262977900112
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5406
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Xiang, T.,Luo, H. G.,Lu, D. H.,et al. Intrinsic electron and hole bands in electron-doped cuprate superconductors[J]. PHYSICAL REVIEW B,2009,79(1):-.
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