We describe a theoretical scheme for the determination of quasiparticle spectra starting from the energy band structure of a metal and treating the on-site Hubbard repulsion beyond the mean-field theory. The method relies upon an expansion of the many-body states in terms of uncorrelated states with a different number of electron-hole pairs. By truncating the expansion to include configurations with one or two pairs one can achieve approximate expressions of the electron and hole self-energies. The interparticle scattering matrices appearing in such expressions are conveniently calculated using the Faddeev approach. Calculations performed for a constant density of states allow us to illustrate the role of three-body correlations in the metal-insulator transitions.
Three-Body Scattering Theory of Correlated Hole and Electron States / CALANDRA BUONAURA, Carlo; MANGHI, Franca. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 50(1994), pp. 2061-2074.
Data di pubblicazione: | 1994 |
Titolo: | Three-Body Scattering Theory of Correlated Hole and Electron States |
Autore/i: | CALANDRA BUONAURA, Carlo; MANGHI, Franca |
Autore/i UNIMORE: | |
Rivista: | |
Volume: | 50 |
Pagina iniziale: | 2061 |
Pagina finale: | 2074 |
Codice identificativo ISI: | WOS:A1994PA18700002 |
Codice identificativo Scopus: | 2-s2.0-0001520094 |
Codice identificativo Pubmed: | 9976416 |
Citazione: | Three-Body Scattering Theory of Correlated Hole and Electron States / CALANDRA BUONAURA, Carlo; MANGHI, Franca. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 50(1994), pp. 2061-2074. |
Tipologia | Articolo su rivista |
File in questo prodotto:

I documenti presenti in Iris Unimore sono rilasciati con licenza Creative Commons Attribuzione - Non commerciale - Non opere derivate 3.0 Italia, salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris