Titlebook: Concepts in Electron Correlation; Alex C. Hewson,Veljko Zlatić Book 2003 Springer Science+Business Media Dordrecht 2003 band structure.con

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Topological Degree for Wave Equations,We present results of numerical renormalization group calculations for an impurity Anderson model with a coupling to a local phonon mode. The calculations are then extended, by incorporating the self-consistency condition of dynamic mean field theory, to consider the behaviour of the infinite dimensional Holstein model.

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,-Axis Intra-Layer Couplings in the CUO, Planes of High-T, Cuprates,We discuss the static deformations of the doped CuO. lattices in YBC.O.. Intrinsic lattice effects driven by the strong correlations of the electron system are separated from extrinsic chemical and bandstructure effects, .-axis displacements of the planar copper atoms seem to be a generic property of the metallic CuO. lattices.

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Renormalization Group Approaches for Systems with Electron-Electron and Electron-Phonon InteractionWe present results of numerical renormalization group calculations for an impurity Anderson model with a coupling to a local phonon mode. The calculations are then extended, by incorporating the self-consistency condition of dynamic mean field theory, to consider the behaviour of the infinite dimensional Holstein model.

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Concepts in Electron Correlation978-94-010-0213-4Series ISSN 1568-2609

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https://doi.org/10.1007/978-4-431-54177-6 diagram. Particular attention has been paid to the interrelation of high-temperature anomalies, i.e. a glass transition associated with the ethylene end groups at .. ≃ 50 — 80 . and a density-wave-type transition at T. ≃ 40 ., with the superconducting state.

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Periodic Oscillations of Wave Equations,ce depends on the strength, and kind, of intersite interactions. This gives rise to complicated phase diagrams, and an enhanced role of frustration and fluctuation effects. The general principles are illustrated on the example of the effect of a magnetic field on quadrupolar phase transitions in the Pr-filled skutterudite PrFe.P..