2020/12/01 by N. M. Plakida, Н. М. Плакида
Materials Science · Physics and Astronomy · #Condensed matter physics #Coulomb #Cuprate #Electron #Electron pair #High-temperature superconductivity #Hubbard model #Magnetic and transport properties of perovskites and related materials #Microscopic theory #Pairing #Phonon #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Strongly correlated material #Superconductivity #cond-mat.str-el
paper · pdf · doi:10.5488/cmp.23.43701
published as Condens. Matter Phys., 2020, vol. 23, No, 4, 43701 · 10 pages, 3 figures. arXiv admin note: text overlap with arXiv:1611.07813
openalex publication_date 2020/12/01 · arxiv created 2021/01/18 · arxiv updated 2021/01/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A consistent microscopic theory of superconductivity for strongly correlated electronic systems is presented. The Dyson equation for the normal and anomalous Green functions for the projected (Hubbard) electronic operators is derived. To compare various mechanisms of pairing, the extended Hubbard model is considered where the intersite Coulomb repulsion and the electron-phonon interaction are taken into account. We obtain the d-wave pairing with high-Tc induced by the strong kinematical interaction of electrons with spin fluctuations, while the Coulomb repulsion and the electron-phonon interaction are suppressed for the d-wave pairing. These results support the spin-fluctuation mechanism of high-temperature superconductivity in cuprates previously proposed in phenomenological models.