2007/02/17 by Romuald Lemanski, R. Lemański, Lemanski, Romuald
Physics and Astronomy · #Charge (physics) #Charge ordering #Condensed matter physics #Coupling (piping) #Coupling constant #Electron #FOS: Physical sciences #Ising model #Lattice (music) #Materials science #Nonlinear Photonic Systems #Order (exchange) #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum chaos and dynamical systems #Quantum mechanics #Square lattice #Strong Light-Matter Interactions #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0702415
published in arXiv (Cornell University) (Cornell University) · 5 pages, 3 figures
arxiv created 2007/02/17 · openalex publication_date 2007/02/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We perform a simplified analysis of finite temperature properties of the generalized Falicov-Kimball model with Hund coupling. The model is studied on the square lattice for fixed values of f-electron and d-electron densities ρf=1/2, ρd=1. Using an approxiamte scheme we estimated free energies of the following three phases: the charge and spin ordered (SCO), the charge ordered (CO) and the non-ordered (NO). Comparing the free energies we detected phase transitions and found how the transition temperatures depend on the on-site interaction parameters. It appears, that the transition temperture between SCO and CO is much lower than between CO and NO, but their maximum values are attained at values of coupling constants very close to each other.