Premium
Second‐order perturbation treatment of correlations in transition metal alloys
Author(s) -
Drchal V.,
Kudrnovský J.
Publication year - 1983
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221160115
Subject(s) - coulomb , condensed matter physics , coherent potential approximation , perturbation theory (quantum mechanics) , transition metal , hubbard model , perturbation (astronomy) , copper , alloy , physics , materials science , quantum mechanics , chemistry , electronic structure , metallurgy , biochemistry , superconductivity , catalysis , electron
Correlation effects in disordered transition metal alloys are studied within the degenerated Hubbard model using the perturbation theory limited to the second order in U/w ( U Coulomb integral, w bandwidth). The influence of disorder is included within the coherent potential approximation. The theory is illustrated on a simple model of the copper–nickel alloy.