We analyze the two-orbital Hubbard model by means of the composite operator method with the aim at studying the phenomenon of orbital selective Mott transition (OSMT). The model contains an interorbital interaction U′, in addition to the usual intraorbital one U. As warming-up approximation, we use a basis of two operators only, the Hubbard operators. The analysis of the density of states at the chemical potential as a function of the ratio between the bandwidths of the two orbitals shows the clear signature of an orbital selective Mott transition as expected. © 2007 Elsevier B.V. All rights reserved.

The two-orbital Hubbard model and the OSMT

AVELLA, Adolfo;MANCINI, Ferdinando;ODASHIMA, SATORU;SCELZA, GIOVANNI
2007-01-01

Abstract

We analyze the two-orbital Hubbard model by means of the composite operator method with the aim at studying the phenomenon of orbital selective Mott transition (OSMT). The model contains an interorbital interaction U′, in addition to the usual intraorbital one U. As warming-up approximation, we use a basis of two operators only, the Hubbard operators. The analysis of the density of states at the chemical potential as a function of the ratio between the bandwidths of the two orbitals shows the clear signature of an orbital selective Mott transition as expected. © 2007 Elsevier B.V. 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/11386/1655198
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 6
social impact