Abstract
Striped superconductivity (SC) with lattice distortions is investigated based on the 3-band (d–p) Hubbard model for high- T c cuprates. A stable inhomogeneous striped state is investigated in the low-temperature tetragonal (LTT) phase and low-temperature orthogonal (LTO) phase using a quantum variational Monte Carlo method. The ground state has vertical or horizontal hole-rich arrays coexisting with incommensurate magnetism and SC induced by several percents of lattice deformations in the LTT phase. The diagonal stripes are stabilized in the lightly doped LTO phase. The SC order parameter oscillates according to the inhomogeneity in the antiferromagnetic background with its maximums in the hole-rich regions, and the SC condensation energy is reduced as the doping rate decreases.
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