Hole-density evolution of the one-particle spectral function in doped ladders

Article

关键词: COUPLED HUBBARD CHAINS;    T-J LADDERS;    CORRELATED ELECTRONS;    DYNAMICAL PROPERTIES;    HILBERT-SPACES;    NORMAL-STATE;    BI2SR2CACU2O8+DELTA;    PHOTOEMISSION;    TEMPERATURE;    SUPERCONDUCTIVITY;   

DOI  :  10.1103/PhysRevB.59.13596

来源: SCIE

【 摘 要 】

The spectral function A(q,omega) of doped t-J ladders is presented on clusters with up to 2x20 sites at zero temperature applying a recently developed technique that uses up to similar to 6x10(6) rung-basis states. Similarities with photoemission results for the two-dimensional cuprates are observed, such as the existence of a gap at (pi,0) near half-filling (caused by hole pair formation) and flat bands in its vicinity. These features should be observable in angle-resolved photoemission spectroscopy experiments on ladders. The main result of the paper is the nontrivial evolution of the spectral function from a narrow band at x=0, to a quasinoninteracting band at x greater than or equal to 0.5. It was also observed that the low-energy peaks of a cluster spectra acquire finite linewidths as their energies move away from the chemical potential. [S0163-1829(99)08621-X].

【 授权许可】

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