2005/06/15 by E. Schachinger, J. P. Carbotte, J. P. Ćarbotte
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.72.014535
published as Phys. Rev. B 72, 014535 (2005) · 9 Pages, 5 Figures Accepted for publication in Phys. Rev. B
arxiv created 2005/06/15 · openalex publication_date 2005/07/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We calculate the optical sum (OS) and the kinetic energy (KE) for a tight binding band in the nearly antiferromagnetic Fermi liquid model which has had some success in describing the electronic structure of the high-Tc cuprates. The interactions among electrons due to the exchange of spin fluctuations profoundly change the probability of occupation (n_k,\ensuremathσ) of states of momentum k and spin \ensuremathσ which is the central quantity in the calculations of OS and KE. Normal and superconducting states are considered as a function of temperature. Both integrals are found to depend importantly on interactions and an independent electron model is inadequate.