Charge ordering and nonlocal correlations in the doped extended Hubbard model

Article

关键词: SPATIAL CORRELATIONS;    TRANSITION;    STATE;    FIELD;    REPULSION;    ELECTRONS;    LATTICE;    SYSTEMS;    STRIPES;    IMAGES;   

DOI  :  10.1103/PhysRevB.97.115117

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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