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】
Free