One-dimensional metallic behavior of the stripe phase in La$_{2-x}$Sr$_x$CuO$_4$

Details One-dimensional metallic behavior of the stripe phase in La$_{2-x}$Sr$_x$CuO$_4$ One-dimensional metallic behavior of the stripe phase in La$_{2-x}$Sr$_x$CuO$_4$

1999-12-17

arxiv.org/abs/cond-mat/9912320v1

PRL 84, 4962 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.84.4962

Using an exact diagonalization method within the dynamical mean-field theory we study stripe phases in the two-dimensional Hubbard model. We find a crossover at doping $\delta\simeq 0.05$ from diagonal stripes to vertical site-centered stripes with populated domain walls, stable in a broad range of doping, $0.05<\delta<0.17$. The calculated chemical potential shift $\propto -\delta^2$ and the doping dependence of the magnetic incommensurability are in quantitative agreement with the experimental results for doped La$_{2-x}$Sr$_x$CuO$_4$. The electronic structure shows one-dimensional metallic behavior along the domain walls, and explains the suppression of spectral weight along the Brillouin zone diagonal.

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