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• W965497677 endingPage "270" @default.
• W965497677 startingPage "213" @default.
• W965497677 abstract "This chapter reviews the electronic structure of the La2–xMxCuO4–y (M=Ba, Sr, Ca) and RBa2Cu3O7–δ (R= Y, Eu, Gd,…) systems. Emphasis is placed on the various theoretical models that have been proposed, beginning with state-of-the-art band structure calculations and proceeding to more idealized model Hamiltonian treatments of correlation effects. The relationships between different models and the implications of existing spectroscopic data are also examined. Two well established conclusions are that the behavior of both systems is dominated by the same microscopic physics, and the crucial Cu 3d and O 2p electrons are strongly interacting and are not adequately described by conventional one-electron band theory. The most important unresolved problem in the area of electronic structure is the nature of the low-lying excitations in the normal metallic phase of these materials. The primary issue is whether such excitations can be adequately described by Fermi liquid theory, or whether one needs to consider a more exotic alternative, such as resonating valence bond theory. The first Fermi surface studies on the new superconductors based on two-dimensional angular correlation of positron annihilation radiation measurements yield some features that are in reasonable agreement with local density approximation band theory but yield other features that disagree." @default.
• W965497677 created "2016-06-24" @default.
• W965497677 creator A5074859582 @default.
• W965497677 date "1989-01-01" @default.
• W965497677 modified "2023-10-16" @default.
• W965497677 title "Electronic Structure of Copper-Oxide Superconductors" @default.
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