Stripe phases - possible ground state of the high-Tc superconductors

Details Stripe phases - possible ground state of the high-Tc superconductors Stripe phases - possible ground state of the high-Tc superconductors

2005-12-17

arxiv.org/abs/cond-mat/0512420v1

Low. Temp. Phys. 32, 305 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

17 pages, 14 figures

Scientific paper

10.1063/1.2199430

Based on the mean-field method applied either to the extended single-band Hubbard model or to the single-band Peierls-Hubbard Hamiltonian we study the stability of both site-centered and bond-centered charge domain walls. The difference in energy between these phases is found to be small. Therefore, moderate perturbations to the pure Hubbard model, such as next nearest hopping, lattice anisotropy, or coupling to the lattice, induce phase transitions, shown in the corresponding phase diagrams. In addition, we determine for stable phases charge and magnetization densities, double occupancy, kinetic and magnetic energies, and investigate the role of a finite electron-lattice coupling. We also review experimental signatures of stripes in the superconducting copper oxides.

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