Determinant quantum Monte Carlo study of the enhancement of d-wave pairing by charge inhomogeneity

Article

关键词: PHASE-SEPARATION;    DOPED ANTIFERROMAGNETS;    GROUND-STATE;    DOMAIN-WALLS;    HARTREE-FOCK;    STRIPE ORDER;    LONG-RANGE;    TEMPERATURE;    HOLES;    MAGNETISM;   

DOI  :  10.1103/PhysRevB.86.184506

来源: SCIE

【 摘 要 】

Striped phases, in which spin, charge, and pairing correlations vary inhomogeneously in the CuO2 planes, are a known experimental feature of cuprate superconductors, and are also found in a variety of numerical treatments of the two-dimensional Hubbard Hamiltonian. In this paper, we use determinant quantum Monte Carlo to show that if a stripe density pattern is imposed on the model, the d-wave pairing vertex is significantly enhanced. We attribute this enhancement to an increase in antiferromagnetic order which is caused by the appearance of more nearly half-filled regions when the doped holes are confined to the stripes. We also observe a p-phase shift in the magnetic order.

【 授权许可】

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