Dynamical cluster approximation study of electron localization in the extended Hubbard model

We perform a detailed study of the phase transitions and mechanisms of electron localization in the extended Hubbard model using the dynamical cluster approximation on a 2 x 2 cluster. We explore the interplay of charge order and Mott physics. We find that a nearest-neighbor Coulomb interaction V causes screening effects close to the Mott phase transition, pushing the phase boundary to larger values ofU. We also demonstrate the different effects of V on correlations in metallic and insulating regimes, and document the different correlation aspects of charge order and Mott states.

Automated summary

In this study, the phase transitions and mechanisms of electron localization in the extended Hubbard model were examined using the dynamical cluster approximation on a 2 x 2 cluster. The interplay of charge order and Mott physics was explored, with findings showing the effects of nearest-neighbor Coulomb interaction V on correlations in metallic and insulating regimes, as well as the different correlation aspects of charge order and Mott states.