Titlebook: Narrow-Band Phenomena—Influence of Electrons with Both Band and Localized Character; J. C. Fuggle,G. A. Sawatzky,J. W. Allen Book 1988 Ple

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The Molecular Orbital Cluster Model Approach to Electronic Structureture of this approach is that approximations are included in a controlled fashion. Parameters which are adjusted to make the computed results fit experimental data are not used. In principle, the exact cluster wavefunction may be obtained by using a sufficiently large CI. The approach is truly ab initio.

Diluge

Qualitative Considerations on Transition Metal Compoundso a lowering of U, so that U < U.. This screening effect is generally quite large, and ΔU. is usually of the same order as U.. It is even possible that the net effect of screening is so large that U < 0 (overscreening). If this is the case, charge transfer d. + d. → d. + d. will occur spontaneously, and the state d. + d. is the more stable one.

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Ferritin

Introductionround state properties, which have provided a challenge to achieving a unified theory of the electronic structure of solids for at least 50 years. The reason for this is that the properties of a particular narrow band material are nearly always surprising, either from a theoretical perspective or fr

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季雨

Dynamical Magnetic Fluctuations in Narrow Band Metalsic of heavy fermion f systems has been observed in a variety of d metals on the verge of a magnetic phase transition or a Mott transition at low temperatures., whilst recently via the de Haas van Alphen effect. and through considerations of other low temperature phenomena. it has been demonstrated t

预测

The Role of Fermi Surface Anisotropies in Heavy-Fermion Superconductorsis formed only on part of the Fermi-surface. In UBe., at least part of the Fermi-surface that does not participate in superconductivity at T. = 0.9K develops an order parameter in the accessible temperature range, i.e. at 0.55K. The effect can be sharply enhanced by doping UBe. with a few at% Th, le

斜坡

Ordering Phenomena in Heavy-Fermion Compoundsnomalies indicate an effective mass of the electrons at the Fermi level, which is two orders of magnitude larger than the free-electron mass. Although the large effective mass is intriguing in itself, even more astonishing is the occurrence of superconductivity in the heavy-fermion compounds as well

不透明

Gaining Control Over Rare Earth Valence Fluctuationsistivity minimum in dilute alloys of simple metals with magnetic transition metal impurities. If this view is correct, then the existence of this workshop in 1987 proves that the problem turned out to be a very difficult one because it is apparently not yet solved to anybody’s satisfaction in spite