Effective Hamiltonian for High-T_c Cu Oxides
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概要
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The effective Hamiltonian for high-7'. Cu-based oxide superconductors is derivedbased on Cu:d.z ,2 and 0:7t, orbitals in the Cu-0 plane by taking into account theintra- and nearest-neighbor interatomic Coulomb interactions for both cases of holeand electron doping. For hole doping, where the stability of Cu" is assumed, theeffective Hamiltonian proves to have various interaction processes, some features ofwhich are studied by considering a case with a single Cu spin and one hole in the ox-ygen band. The spatial extent of the singlet-bound state in this case has been exam-ined to the linear order of the oxygen band width. For electron doping the effectiveHamiltonian is much simpler and essentially the same as the t J model. Based onthese results we discuss the relevance of the t -J model to the high-7'. Cu oxides. Theeffects of Curd,.. ,2 orbitals and 0:p. orbitals at the apex of the pyramid or oc-tahedron are also examined.
- 社団法人日本物理学会の論文
- 1989-08-15
著者
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Fukuyama Hidetoshi
Institute For Solid State Physics The University Of Tokyo
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Matsukawa Hiroshi
Institute For Solid State Physics University Of Tokyo
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Matsukawa Hiroshi
Institute For Solid State Physics The University Of Tokyo:fellowship Of The Japan Society For The Pr
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