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题名: Microscopic hamiltonian for Zn- or Ni-substituted high-temperature cuprate superconductors
作者: Xiang, T ;  Su, YH ;  Panagopoulos, C ;  Su, ZB ;  Yu, L
刊名: PHYSICAL REVIEW B
出版日期: 2002
卷号: 66, 期号:17, 页码:-
关键词: D-WAVE SUPERCONDUCTORS ;  RESONANT IMPURITY SCATTERING ;  T-C SUPERCONDUCTORS ;  MAGNETIC-IMPURITIES ;  SUPERFLUID RESPONSE ;  OXIDES ;  STATE ;  ATOMS ;  BI2SR2CACU2O8+DELTA ;  TRANSITION
学科分类: Physics
通讯作者: Xiang, T , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Acad Sinica, Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China; Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England; Univ Cambridge, IRC Superconductiv, Cambridge CB3 0HE, England; Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy
英文摘要: We have derived the effective low-energy Hamiltonian for Zn- or Ni-substituted high-T-c cuprates from microscopic three-band models consisting of the most relevant Cu or impurity 3d and O 2p orbitals. We find that both the scattering potential and hopping integral induced by impurities have a finite range but decay very fast with distance from the impurity. The Zn scattering potential is very strong and attractive for electrons. The Ni scattering potential is much weaker than the Zn case, resulting from the hybridization between Ni ions and O holes. This profound difference is due to neither the electric charge nor d-level location, but rather because of the interplay between the valence state of the impurity and the strong correlation background. It gives a natural account of the unusual effect of Ni and Zn on the reduction of the superconducting transition temperature. The interlayer hopping of electrons is highly anisotropic and nonlocal, determined by the in-plane electronic structure. This leads to a quantum interference of states from different sites and affects strongly the scanning tunneling spectrum perpendicular to CuO2 planes.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000179611700088
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13407
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,Su, YH,Panagopoulos, C,et al. Microscopic hamiltonian for Zn- or Ni-substituted high-temperature cuprate superconductors[J]. PHYSICAL REVIEW B,2002,66(17):-.
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