1993/04/09 by Antoine Georges, Gabriel Kotliar, Werner Krauth · 4 citations
Materials Science · Physics and Astronomy · #Function (biology) #Hubbard model #Iron-based superconductors research #Limit (mathematics) #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Range (aeronautics) #State (computer science) #Superconductivity #cond-mat
paper · pdf · doi:10.1007/bf01308748
12 pages (14 figures not included, available upon request), Latex, LPTENS Preprint 93/10
arxiv created 1993/04/09 · openalex publication_date 1993/09/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study a two-band Hubbard model in the limit of infinite dimensions, using a combination of analytical methods and Monte-Carlo techniques. The normal state is found to display various metal to insulators transitions as a function of doping and interaction strength. We derive self-consistent equations for the local Green's functions in the presence of superconducting long-range order, and extend previous algorithms to this case. We present direct numerical evidence that in a specific range of parameter space, the normal state is unstable against a superconducting state characterized by a strongly frequency dependent order-parameter.