Magnetic ions embedded in a nonmagnetic host exhibit a number of unusual low-
temperature properties known collectively as the Kondo effect. Conventional small …

Publisher Summary Heavy-fermion compounds exhibit a considerably more stable 4f
configuration, although the 4f occupancy still deviates slightly from integral values. They …

Correct descriptions of the electronic structures of dilute alloys of 3d and 4f elements in
simple metals, and explanations of their properties in terms of such descriptions, challenged …

Finite-temperature properties of the infinite-U Anderson model for rare-earth alloys are
calculated within a unified approach. The impurity-electron density of states and magnetic …

Publisher Summary The chapter presents a study on theory of heavy fermion systems. In the
heavy fermion systems it seems that some of the features of the single Kondo impurity …

The Anderson model at zero temperature is studied as a function of the f-level position ɛ f
and the f-level–conduction-electron hop** matrix element V. The ff Coulomb interaction U …

A unified view of the mixed-valence system of Ce impurities in a metal results from a
comprehensive calculation of its properties. The peak position T 0 of the Kondo resonance …

In this paper we review the present status of electron spectroscopy of Ce and Yb Kondo
systems, with particular emphasis on photoemission and inverse photoemission. Our …

A comparative study of the numerical-renormalization group and noncrossing-approximation
(NCA) results for the spectral functions of the U=∞ Anderson impurity model is carried out …

The zero temperature limit of the self-consistent perturbation theory of a degenerate
Anderson impurityin a metal is partially solved with analytical methods. In particular, the …