2000/07/20 by E. Louis, F. Guinea, M. P. Lopez-Sancho +3
Engineering · Physics and Astronomy · #Bose–Hubbard model #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dynamics (music) #Engineering #Hubbard model #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum and electron transport phenomena #Quantum fluctuation #Quantum mechanics #Statics #Statistical physics #Superconductivity #Transverse plane #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.64.205108
4 pages
arxiv created 2000/07/20 · openalex publication_date 2001/11/06 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The internal structure of stripes in the two-dimensional Hubbard model is studied by going beyond the Hartree-Fock approximation. Partially filled stripes with inhomogeneous magnetization and charge along the stripe core, consistent with experimental observations, are stabilized by quantum fluctuations, included through the configuration interaction method. Similar configurations result to be stable for filled stripes, and have a lower energy than the standard paramagnetic core solution. Away from half-filling, solitonlike solutions show up within the Hartree-Fock approximation. The hopping of short regions of the stripes in the transverse direction is comparable to the bare hopping element. The hole-hole correlation shows maxima along the stripe direction, while the integrated value of n_\stackrel\ensuremath→k compares satisfactorily with experimental results.