Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Bulletin of the American Physical Society

Charge order and non-local correlations in the doped two-dimensional extended Hubbard model.

Hanna Terletska, Tianran Chen, Joseph Paki, Emanuel Gull

Published Mar 6, 2018• 0 citations
OpenAlex

Related papers

Effect of non-local interactions and correlations in two-dimensional extended Hubbard model

Hanna Terletska, Tianran Chen, Emanuel Gull

Bulletin of the American Physical Society•Mar 17, 2017•0 citations

Charge ordering and nonlocal correlations in the doped extended Hubbard model

Hanna Terletska, Tianran Chen, Joseph Paki +1 more

We study the extended Hubbard model away from half filling on a two-dimensional square lattice using cluster dynamical mean field theory on clusters of size 8. We show that the model exhibits metallic, compressible charge-ordered, and insulating charge-ordered phases. We determine the location of the charge-ordering phase transition line at finite temperature and the properties of the phases as a function of doping, temperature, local interaction, and nearest-neighbor interaction. An analysis of the energetics of the charge-order transition shows that the charge-ordering transition mainly results in a rearrangement of local and nonlocal potential energy. We show the doping evolution of the spectral function from the isotropic metal via a charge-ordered metal to a charge-ordered insulator with a big gap, and study finite-size effects of the approximation.

arXiv:1801.03532•Physical review. B./Physical review. B•Mar 9, 2018•35 citations

Charge order in the extended Hubbard model

Krzysztof Ro ciszewski, Andrzej M. Oleś

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 repulsion were investigated using correlated wavefunctions. The treatment of spatially inhomogeneous correlations was possible thanks to a combination of the local ansatz and the local increments expansion methods. The surprising result is that in the half-filled case the correlations do not influence the transition from the antiferromagnetic (AF) to charge order (CO) phase found in the Hartree–Fock approximation. For the doped systems we found a variety of stripe or superlattice-like structures for small values of V , while for larger V we identified robust CO phases. For smaller doping (δ = 1/8 and 1/4) the charge-majority sublattice has typically inhomogeneous charge distribution and is decorated by various magnetic patterns, while for larger doping (δ = 1/2) the co-phase is homogeneous (ideal) and with superimposed AF order.

Journal of Physics Condensed Matter•Nov 25, 2003•26 citations

Spin And Charge Correlations of a Disordered Hubbard Model

P. J. H. Denteneer, Richard T. Scalettar, M. Ulmke +1 more

APS•Mar 1, 1997•0 citations

Non-local Coulomb interactions on the triangular lattice in the high-doping regime: Spectra and charge dynamics from Extended Dynamical Mean Field Theory

Sophie Chauvin, Thomas Ayral, Lucia Reining +1 more

We explore the two-dimensional extended Hubbard model on the triangular lattice in the high doping regime. On-site and nearest-neighbour repulsive interactions are treated in a non-perturbative way by means of Extended Dynamical Mean Field Theory. We compute the low-temperature phase diagram, displaying a metallic phase and a symmetry-broken phase for strong intersite repulsions. We describe the correlation effects on both single-particle and two-particle observables in the metallic phase. Whereas single-particle spectra feature a Hubbard satellite typical of strongly correlated systems, local susceptibilities remain close to their non-interacting limit, even for large on-site repulsions. We argue that this behaviour is typical of the strongly doped case. We also report a region in parameter space with negative static local screening.

arXiv:1709.07901•Sep 22, 2017•2 citations

Bond Order Correlations in the 2D Hubbard Model

Conrad Moore, Sameer Abu Asal, Shuxiang Yang +2 more

Bulletin of the American Physical Society•Mar 18, 2016•0 citations
We study the extended Hubbard model away from half filling on a two-dimensional square lattice using cluster dynamical mean field theory on clusters of size 8. We show that the model exhibits metallic, compressible charge-ordered, and insulating charge-ordered phases. We determine the location of the charge-ordering phase transition line at finite temperature and the properties of the phases as a function of doping, temperature, local interaction, and nearest-neighbor interaction. An analysis of the energetics of the charge-order transition shows that the charge-ordering transition mainly results in a rearrangement of local and nonlocal potential energy. We show the doping evolution of the spectral function from the isotropic metal via a charge-ordered metal to a charge-ordered insulator with a big gap, and study finite-size effects of the approximation.
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 repulsion were investigated using correlated wavefunctions. The treatment of spatially inhomogeneous correlations was possible thanks to a combination of the local ansatz and the local increments expansion methods. The surprising result is that in the half-filled case the correlations do not influence the transition from the antiferromagnetic (AF) to charge order (CO) phase found in the Hartree–Fock approximation. For the doped systems we found a variety of stripe or superlattice-like structures for small values of V , while for larger V we identified robust CO phases. For smaller doping (δ = 1/8 and 1/4) the charge-majority sublattice has typically inhomogeneous charge distribution and is decorated by various magnetic patterns, while for larger doping (δ = 1/2) the co-phase is homogeneous (ideal) and with superimposed AF order.
We explore the two-dimensional extended Hubbard model on the triangular lattice in the high doping regime. On-site and nearest-neighbour repulsive interactions are treated in a non-perturbative way by means of Extended Dynamical Mean Field Theory. We compute the low-temperature phase diagram, displaying a metallic phase and a symmetry-broken phase for strong intersite repulsions. We describe the correlation effects on both single-particle and two-particle observables in the metallic phase. Whereas single-particle spectra feature a Hubbard satellite typical of strongly correlated systems, local susceptibilities remain close to their non-interacting limit, even for large on-site repulsions. We argue that this behaviour is typical of the strongly doped case. We also report a region in parameter space with negative static local screening.