Determinant Quantum Monte Carlo Study of the Enhancement of d-wave   Pairing by Charge Inhomogeneity
  Striped phases, in which spin, charge, and pairing correlations vary inhomogeneously in the CuO_2 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 appearence of more nearly half-filled regions when the doped holes are confined to the stripes. We also observe a \pi-phase shift in the magnetic order. 
R. Mondaini and T. Ying and T. Paiva and R.T. Scalettar
cond-mat.str-el cond-mat.supr-con