2002/06/15 by Hirono Fukazawa, Kosaku Yamada · 1 citation
Materials Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1143/jpsj.71.1541
published as J. Phys. Soc. Jpn. 71 (2002) 1541 · 10 pages, 11 figures
openalex publication_date 2002/06/15 · arxiv created 2002/08/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the superconducting instabilities of singlet and triplet pairing in a two-dimensional Hubbard model on the basis of the third-order perturbation theory (TOPT). We investigate the effect of the vertex correction that is given by TOPT, comparing with the study with only the second-order effective interaction. In our results, a stable p-wave pairing state spreads from low to intermediate electron density. A dx2-y2-wave pairing is dominant for the high density near a half-filling. It is shown that the vertex correction plays an essential role in making the p-wave pairing state dominant.