A Green function approximate solution of the Kondo lattice

A Green function approximate solution of the Kondo lattice

A Green function diagrammatic approach is utilised to calculate the density of states of a Kondo lattice described by a periodic Anderson Hamiltonian. The hybridisation between f and conduction electrons is included in the atomic term of the Hamiltonian, which can be solved exactly. The hopping term...

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Veröffentlicht in:Journal of physics. C, Solid state physics Solid state physics, 1988-04, Vol.21 (10), p.1941-1952
Hauptverfasser: DA ROSA SIMOES, A. S, IGLESIAS, J. R, ROJO, A, ALASCIO, B. R
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron density of states and band structure of crystalline solids
Electron states
Exact sciences and technology
Physics
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Zusammenfassung:A Green function diagrammatic approach is utilised to calculate the density of states of a Kondo lattice described by a periodic Anderson Hamiltonian. The hybridisation between f and conduction electrons is included in the atomic term of the Hamiltonian, which can be solved exactly. The hopping terms are considered through an approximate Dyson equation, equivalent to a generalised Hubbard I scheme. The results at T = 0K indicate the existence of a "Kondo peak" at the Fermi level. Metallic or insulating phases are obtained for different occupations of the f and conduction states. 31 ref.--AA
ISSN:0022-3719
DOI:10.1088/0022-3719/21/10/013