2005/12/17 by Marcin Raczkowski, Andrzej M. Oleś, Andrzej M. Oles +2 · 8 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Charge (physics) #Charge ordering #Condensed matter physics #Ground state #Hamiltonian (control theory) #Hubbard model #Iron-based superconductors research #Lattice (music) #Magnetic field #Magnetization #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #cond-mat.str-el
paper · pdf · doi:10.1063/1.2199430
published in Low Temperature Physics 32(4), 305-319 (American Institute of Physics) · 17 pages, 14 figures
arxiv created 2005/12/17 · openalex publication_date 2006/04/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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-neighbor hopping, lattice anisotropy, or coupling to the lattice, induce phase transitions, shown in the corresponding phase diagrams. In addition, we determine the charge for stable phases and magnetization densities, double occupancy, and 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.