The half-filled extended Hubbard model, in one and two dimensions, is studied by means of the two-pole approximation within the Composite Operator Method with the aim of improving the possibilities to describe some of the experimental features observed for quasi-1D organic superconductors and Cu-O planes of cuprates. The phase diagrams (T-V and V-U) are analyzed with respect to the paramagnetic metal - paramagnetic insulator - charge ordered phase transitions. The relevant features of the diagrams (rank of the phase transitions, critical points, reentrant behavior) are discussed in detail. © 2005 Elsevier Ltd. All rights reserved.

Phase diagrams of half-filled 1D and 2D extended Hubbard model within COM

AVELLA, Adolfo;MANCINI, Ferdinando
2006-01-01

Abstract

The half-filled extended Hubbard model, in one and two dimensions, is studied by means of the two-pole approximation within the Composite Operator Method with the aim of improving the possibilities to describe some of the experimental features observed for quasi-1D organic superconductors and Cu-O planes of cuprates. The phase diagrams (T-V and V-U) are analyzed with respect to the paramagnetic metal - paramagnetic insulator - charge ordered phase transitions. The relevant features of the diagrams (rank of the phase transitions, critical points, reentrant behavior) are discussed in detail. © 2005 Elsevier Ltd. All rights reserved.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/1521742
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 8
social impact