Stripe Phases in Layered Nickelates
  To describe quasi two-dimensional nickelates we introduce an effective Hamiltonian for $e_g$ electrons which includes the kinetic energy, on-site Coulomb interactions, spin-spin and Jahn-Teller (static) terms. The experimental stripe phases are correctly reproduced by the model. The mechanisms responsible for stripe formation are different than those reported in cuprates and manganites. 
Krzysztof Ro\'sciszewski and Andrzej M. Ole\'s
cond-mat.str-el cond-mat.mtrl-sci