Spectral properties of the planar t-J model

Article

关键词: QUASI-PARTICLE DISPERSION;    HIGH-TEMPERATURE SUPERCONDUCTORS;    FERMI-SURFACE;    HUBBARD-MODEL;    NORMAL-STATE;    DYNAMICS;    ANTIFERROMAGNETS;    PHENOMENOLOGY;    CHARGE;   

DOI  :  10.1103/PhysRevB.55.R7307

来源: SCIE

【 摘 要 】

The single-particle spectral functions A(k,omega) and self-energies Sigma(k,omega) are calculated within the t-J model using the finite-temperature Lanczos method for small systems. A remarkable asymmetry between the electron and hole part is found. The hole (photoemission) spectra are overdamped, with Im Sigma proportional to omega in a wide energy range, consistent with the marginal Fermi liquid scenario, and in good agreement with experiments on cuprates. In contrast, the quasiparticles in the electron part of the spectrum show weak damping.

【 授权许可】

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