We perform a thorough study of the extended Hubbard model featuring local and nearest-neighbor Coulomb repulsion. Using the dynamical mean-field theory we investigated the zero-temperature phase diagram of this model as a function of the chemical doping. The interplay between local and nonlocal interactions drives a variety of phase transitions connecting two distinct charge-ordered insulators, i.e., half filled and quarter filled, a charge-ordered metal and a Mott-insulating phase. We characterize these transitions and the relative stability of the solutions and we show that the two interactions conspire to stabilize the quarter-filled charge-ordered phase.

Doping-driven metal-insulator transitions and charge orderings in the extended Hubbard model / Kapcia, K. J.; Robaszkiewicz, S.; Capone, Massimo; Amaricci, Adriano. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 95:12(2017), pp. 1-11. [10.1103/PhysRevB.95.125112]

Doping-driven metal-insulator transitions and charge orderings in the extended Hubbard model

Capone, Massimo;Amaricci, Adriano
2017-01-01

Abstract

We perform a thorough study of the extended Hubbard model featuring local and nearest-neighbor Coulomb repulsion. Using the dynamical mean-field theory we investigated the zero-temperature phase diagram of this model as a function of the chemical doping. The interplay between local and nonlocal interactions drives a variety of phase transitions connecting two distinct charge-ordered insulators, i.e., half filled and quarter filled, a charge-ordered metal and a Mott-insulating phase. We characterize these transitions and the relative stability of the solutions and we show that the two interactions conspire to stabilize the quarter-filled charge-ordered phase.
2017
95
12
1
11
125112
https://arxiv.org/abs/1611.03455
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.125112
Kapcia, K. J.; Robaszkiewicz, S.; Capone, Massimo; Amaricci, Adriano
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/50414
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