Destruction of superconductivity by impurities in the attractive Hubbard model

Article

关键词: QUANTUM MONTE-CARLO;    PHASE-DIAGRAM;    INSULATOR-TRANSITION;    INFINITE DIMENSIONS;    BETHE-ANSATZ;    HEAT CURVES;    DISORDER;    SYSTEMS;    ORDER;    METAL;   

DOI  :  10.1103/PhysRevB.72.144513

来源: SCIE

【 摘 要 】

We study the effect of U=0 impurities on the superconducting and thermodynamic properties of the attractive Hubbard model on a square lattice. Removal of the interaction on a critical fraction of f(crit)approximate to 0.30 of the sites results in the destruction of off-diagonal long-range order in the ground state. This critical fraction is roughly independent of filling in the range 0.75

【 授权许可】

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