Charge orderings in the atomic limit of the extended Hubbard model

  title={Charge orderings in the atomic limit of the extended Hubbard model},
  author={Grzegorz Pawlowski},
  journal={The European Physical Journal B - Condensed Matter and Complex Systems},
  • G. Pawlowski
  • Published 17 November 2006
  • Physics
  • The European Physical Journal B - Condensed Matter and Complex Systems
Abstract. The extended Hubbard model in the atomic limit (AL-EHM) on a square lattice with periodic boundary conditions is studied with use of the Monte Carlo (MC) method. Within the grand canonical ensemble the phase and order-order boundaries for charge orderings are obtained. The phase diagrams include three types of charge ordered phases and the nonordered phase. The system exhibits very rich structure and shows unusual multicritical behavior. In the limiting case of tij=0, the EHM is… 

One-dimensional extended Hubbard model in the atomic limit.

  • F. ManciniF. Mancini
  • Physics
    Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2008
This study evidences that a finite-range order persists for a wide range of the temperature, as shown by the behavior of the correlation functions and by the two-peak structure exhibited by the charge susceptibility and the entropy.

Different orderings in the narrow-band limit of the extended Hubbard model on the Bethe lattice

AbstractWe present the exact solution of a system of Fermi particles living on the sites of a Bethe lattice with coordination number z and interacting through on-site U and nearest-neighbor V

On the phase diagram of the zero-bandwidth extended Hubbard model with intersite magnetic interactions for strong on-site repulsion limit

In this report we have analyzed a simple effective model for a description of magnetically ordered insulators. The Hamiltonian considered consists of the effective on-site interaction (U) and the

Various Charge-Ordered States in the Extended Hubbard Model with On-Site Attraction in the Zero-Bandwidth Limit

The extended Hubbard model in the zero-bandwidth limit with intersite density–density interactions (nearest- and next-nearest-neighbor) is analyzed in the site-dependent mean-field approximation. In

Role of the attractive intersite interaction in the extended Hubbard model

We consider the extended Hubbard model in the atomic limit on a Bethe lattice with coordination number z. By using the equations of motion formalism, the model is exactly solved for both attractive

Charge Order of Strongly Bounded Electron Pairs on the Triangular Lattice: the Zero-Bandwidth Limit of the Extended Hubbard Model with Strong Onsite Attraction

  • K. Kapcia
  • Physics
    Journal of Superconductivity and Novel Magnetism
  • 2019
The inhomogeneous distribution of charged particles is known as charge-order phenomena. Recent experimental studies of (quasi-) two-dimensional materials found different ordered patterns on the



Charge ordering and phase separation in the infinite dimensional extended Hubbard model

We study the extended Hubbard model with both on-site (U) and nearest neighbor (V) Coulomb repulsion using the exact diagonalization method within the dynamical mean field theory. For a fixed U

High-temperature series expansion for the extended Hubbard model.

The single-band Hubbard model is studied, extended by an intersite interaction, and the antiferromagnetic phase is stabilized by repulsive {ital W}, in the limit of strong intrasite repulsion.

Charge order in the extended Hubbard model

Magnetic and charge order in half-filled and doped finite two-dimensional (8 ? 8) clusters described by the extended Hubbard Hamiltonian with medium to large on-site (U) and intersite (V) Coulomb

The extended Hubbard model in the ionic limit

Abstract. In this paper, we study the Hubbard model with intersite Coulomb interaction in the ionic limit (i.e. no kinetic energy). It is shown that this model is isomorphic to the spin-1 Ising model

The staggered charge-order phase of the extended Hubbard model in the atomic limit

We study the phase diagram of the extended Hubbard model in the atomic limit. At zero temperature, the phase diagram decomposes into six regions: three with homogeneous phases (characterized by

Metal-insulator transition in the quarter-filled frustrated checkerboard lattice

Abstract.We study the electronic structure and correlations in the geometrically frustrated two dimensional checkerboard lattice. In the large U limit considered here we start from an extended

Charge ordering in extended Hubbard models: Variational cluster approach

We present a generalization of the recently proposed variational cluster perturbation theory to extended Hubbard models at half filling with repulsive nearest neighbor interaction. The method takes

Charge ordering, charge fluctuations and lattice effects in strongly correlated electron systems

Charge fluctuation and charge-ordering phenomena in compounds based on the 3d electrons of transition-metal ions and 4f electrons of rare-earth ions are reviewed with particular emphasis on the

Phase diagram of the two-dimensional extended Hubbard model: Phase transitions between different pairing symmetries when charge and spin fluctuations coexist

In order to explore how superconductivity arises when charge fluctuations and spin fluctuations coexist, we have obtained a phase diagram against the off-site repulsion $V$ and band filling $n$ for