Lattice distortions, incommensurability, and stripes in the electric model for high-Tc cuprates

Details Lattice distortions, incommensurability, and stripes in the electric model for high-Tc cuprates Lattice distortions, incommensurability, and stripes in the electric model for high-Tc cuprates

2003-06-18

arxiv.org/abs/cond-mat/0306458v1

Physical Review B67, 132408 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.67.132408

Striped superconductivity with lattice distortions is investigated based on the three-band Hubbard model for high-Tc cuprates. A stable inhomogeneous striped state is determined in the low-temperature tetragonal (LTT) phase with lattice distortions using a quantum variational Monte Carlo method. The ground state has vertical or horizontal hole-rich arrays coexisting with incommensurate magnetism and superconductivity induced by several percent lattice distortions. The superconductivity order parameter oscillates according to the inhomogeneity in the antiferromagnetic background with its maxima in the hole-rich regions, and the superconductivity condensation energy is reduced as the doping rate decreases.

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