Stripes and spin-incommensurabilities are favored by lattice anisotropies

Details Stripes and spin-incommensurabilities are favored by lattice anisotropies Stripes and spin-incommensurabilities are favored by lattice anisotropies

2001-08-13

arxiv.org/abs/cond-mat/0108198v1

Physics

Condensed Matter

Strongly Correlated Electrons

accepted for publication on Physical Review Letters, one color figure

Scientific paper

10.1103/PhysRevLett.87.167005

Structural distortions in cuprate materials give a natural origin for anisotropies in electron properties. We study a modified one-band t-J model in which we allow for different hoppings and antiferromagnetic couplings in the two spatial directions ($t_x \ne t_y$ and $J_x \ne J_y$). Incommensurate peaks in the spin structure factor show up only in the presence of a lattice anisotropy, whereas charge correlations, indicating enhanced fluctuations at incommensurate wave vectors, are almost unaffected with respect to the isotropic case.

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