1998/01/15 by E. Louis, F. Guinea, M. P. López-Sancho +3
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Coupling (piping) #Electron #Hubbard model #Kinetic energy #Limit (mathematics) #Materials science #Mathematics #Mean field theory #Physics #Physics of Superconductivity and Magnetism #Polaron #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1209/epl/i1998-00461-5
4 pages
arxiv created 1998/01/15 · openalex publication_date 1998/10/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
The interactions between holes in the Hubbard model, in the low-density, inter mediate-to-strong coupling limit, are investigated. Dressed spin polarons in neighboring sites have an increased kinetic energy and an enhanced hopping rate. Both effects are of the order of the hopping integral and lead to an effective attraction at intermediate couplings. Our results are derived by systematically improving mean-field calculations. The method can also be used to derive known properties of isolated spin polarons.