1993/06/28 by Werner Krauth, Michel Caffarel, Krauth, Werner +1
Materials Science · Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9306056
7 pages, revtex, 3 postscript figures appended, LPSENS preprint 93-17
arxiv created 1993/06/28 · openalex publication_date 1993/06/28 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We apply an exact diagonalization method to the the infinite-D two-band Hubbard model. The method is essentially exact for the calculation of thermodynamic properties for all but the smallest frequencies and yields a resolution unavailable in Monte Carlo calculations. We establish the instability of the normal state with respect to singlet superconductivity at small frequencies at small doping, the regime of relevance for High-Tc superconductors. We also present evidence for the existence of an instability towards triplet superconductivity in the large doping regime n ∼ 2.