2005/09/27 by B. Davoudi, A. -M. S. Tremblay, A.–M. S. Tremblay · 40 citations
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Charge (physics) #Computer science #Condensed matter physics #Electron #Hubbard model #Mathematics #Monte Carlo method #Order (exchange) #Physics #Physics of Superconductivity and Magnetism #Quantum Monte Carlo #Quantum and electron transport phenomena #Quantum mechanics #Statistical physics #Statistics #Superconductivity #cond-mat.str-el #k-nearest neighbors algorithm
paper · pdf · doi:10.1103/physrevb.74.035113
published in Physical Review B 74(3) (American Physical Society) · 16 pages, 8 figures, submitted to PRB
arxiv created 2005/09/27 · openalex publication_date 2006/07/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We generalize the two-particle self-consistent approach (TPSC) to study the extended Hubbard model, where nearest-neighbor interaction is present in addition to the usual local screened interaction. Similarities and differences between the TPSC approach and the Singwi, Tosi, Land, Sj"olander (STLS) approximation for the electron gas are discussed. The accuracy of our extension of TPSC is assessed by comparisons with Quantum Monte Carlo calculations of Y. Zhang and J. Callaway [Phys. Rev. B 39, 9397 (1989)]. We quantify how a positive off-site interaction enhances staggered charge fluctuations and reduces staggered magnetic order.