Angle-resolved photoemission spectra of the Hubbard model

Article

关键词: D-WAVE SUPERCONDUCTIVITY;    ELECTRONIC-STRUCTURE;    FERMI-SURFACE;    CLUSTER;    RENORMALIZATION;    APPROXIMATION;    PSEUDOGAPS;    DYNAMICS;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.66.075102

来源: SCIE

【 摘 要 】

We discuss spectra calculated for the two-dimensional Hubbard model in the intermediate coupling regime with the dynamical cluster approximation, which is a nonperturbative approach. We find a crossover from a normal Fermi liquid with a Fermi surface closed around the Brillouin-zone center at large doping to a non-Fermi liquid for small doping where the Fermi surface is holelike, closed around M=(pi,pi). The topology of the Fermi surface at low doping indicates a violation of Luttinger's theorem. We discuss different ways of presenting the spectral data to extract information about the Fermi surface. A comparison to recent experiments is presented.

【 授权许可】

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