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Microscopic hamiltonian for Zn- or Ni-substituted high-temperature cuprate superconductors
Xiang, T; Su, YH; Panagopoulos, C; Su, ZB; Yu, L; Xiang, T , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
2002
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号66期号:17页码:-
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.
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
关键词D-wave Superconductors Resonant Impurity Scattering T-c Superconductors Magnetic-impurities Superfluid Response Oxides State Atoms bi2sr2cacu2o8+delta Transition
学科领域Physics
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收录类别SCI
WOS记录号WOS:000179611700088
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被引频次:11[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/311006/13407
专题1978-2010年知识产出
通讯作者Xiang, T , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
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GB/T 7714
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):-.
APA Xiang, T,Su, YH,Panagopoulos, C,Su, ZB,Yu, L,&Xiang, T , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2002).Microscopic hamiltonian for Zn- or Ni-substituted high-temperature cuprate superconductors.PHYSICAL REVIEW B,66(17),-.
MLA Xiang, T,et al."Microscopic hamiltonian for Zn- or Ni-substituted high-temperature cuprate superconductors".PHYSICAL REVIEW B 66.17(2002):-.
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