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J Phys Condens Matter ; 36(47)2024 Sep 06.
Artigo em Inglês | MEDLINE | ID: mdl-39106895

RESUMO

A multi-orbital ionic Hamiltonian is presented to analyze the many-body properties of the d-transition metal atoms. This Hamiltonian considers all the atomic states obeying the first Hund's rule and also includes all orbital degeneracy, as well as the interaction of the atom with a metal. We analyze the solution of this ionic Hamiltonian by means of the equation of Motion method up to the fourth order,V4, in the atom-metal interaction. Equations for the appropriate Green-functions for analyzing the chemical and transport properties of the system are given for different atom occupancies. In particular, we introduce a full analysis of the multi-orbital Hamiltonian including atomic configurations withN, N+ 1 andN- 1 electrons, and discuss its Kondo properties. The shellsd1,d2andd3are analyzed in detail and Kondo energies are deduced in all these cases showing good agreement with the conventional known results.

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