Striped phases in the two-dimensional Hubbard model with long-range Coulomb interaction

Details Striped phases in the two-dimensional Hubbard model with long-range Coulomb interaction Striped phases in the two-dimensional Hubbard model with long-range Coulomb interaction

1998-03-14

arxiv.org/abs/cond-mat/9803184v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.58.13506

We investigate the formation of partially filled domain walls in the two-dimensional Hubbard model in the presence of long-range interaction. Using an unrestricted Gutzwiller variational approach we show that: i) the strong local interaction favors charge segregation in stripe domain walls; ii) The long-range interaction favors the formation of half-filled vertical stripes with a period doubling due to the charge and a period quadrupling due to the spins along the wall. Our results show that, besides the underlying lattice structure, also the electronic interactions can contribute to determine the different domain wall textures in Nd doped copper oxides and nickel oxides.

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