The tilt pattern of the CuO_6 octahedra in the LTT phase of the cuprate superconductors leads to planar anisotropies for the exchange coupling and hopping integrals. Here, we show that these anisotropies provide a possible structural mechanism for the orientation of stripes. A t_x-t_y-J_x-J_y model thus serves as an effective Hamiltonian to describe stripe formation and orientation in LTT-phase cuprates.
@article{arxiv.cond-mat/0102524,
title = {Stripe orientation in an anisotropic t-J model},
author = {Arno P. Kampf and Douglas J. Scalapino and Steven R. White},
journal= {arXiv preprint arXiv:cond-mat/0102524},
year = {2009}
}