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• W2051931841 endingPage "159" @default.
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• W2051931841 abstract "A detailed tight-binding analysis of the electron band structure of the CuO2plane of layered cuprates is performed within a σ -band Hamiltonian including four orbitals - Cu 3dx2 -y2 and Cu 4s, O 2px and O 2py . Both the experimental and theoretical indications in favour of a Fermi level located in a Cu or O band, respectively, are considered. For these two alternatives, analytical expressions are obtained for the linear combination of atomic orbitals (LCAO) electron wave functions suitable for the treatment of electron superexchange. Simple formulae for the Fermi surface and electron dispersions are derived by applying the Löwdin downfolding procedure to set up the effective copper and oxygen Hamiltonians. They are used to fit the experimental angle-resolved ultraviolet photoelectron spectroscopy (ARUPS) Fermi surface of Pb0.42 Bi1.73 Sr1.94 Ca1.3 Cu1.92 O8+x and both the ARPES and local density approximation (LDA) Fermi surface of . The value of presenting the hopping amplitudes as surface integrals of ab initioatomic wave functions is demonstrated as well. The same approach is applied to the RuO2plane of the ruthenate Sr2 RuO4 . The LCAO Hamiltonians including the three in-plane π -orbitals Ru 4dxy , Oa2py , Ob2px and the four transverse π -orbitals Ru 4dzx , Ru 4dyz , Oa2pz , Ob2pz are considered separately. It is shown that the equation for the constant-energy curves and the Fermi contours has the same canonical form as the one for the layered cuprates." @default.
• W2051931841 created "2016-06-24" @default.
• W2051931841 creator A5030867627 @default.
• W2051931841 creator A5036000075 @default.
• W2051931841 date "1999-12-13" @default.
• W2051931841 modified "2023-09-26" @default.
• W2051931841 title "Tight-binding modelling of the electronic band structure of layered superconducting perovskites" @default.
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• W2051931841 doi "https://doi.org/10.1088/0953-8984/12/2/305" @default.
• W2051931841 hasPublicationYear "1999" @default.
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