Density of states in narrow energy bands
β
O. Goscinski
π
Article
π
1971
π
Elsevier Science
π
English
β 203 KB
## It was pointed out by Bari and Kaplan [l] that, contrary to expectations, the single-particle Green function decoupling procedure due to Hubbard [2], when applied to the one band short-range interaction mode!. [2], does not reduce to the Hartree-Fock approximation for arbitrarily small, but fi