2005/04/08 by Y. Ohta, Satoshi Nishimoto, S. Nishimoto +4
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.72.012503
published as Phys. Rev. B 72, 012503 (2005)
arxiv created 2005/04/08 · openalex publication_date 2005/07/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The density-matrix renormalization group method is used to study the ground state of the two-chain zigzag-bond Hubbard model at quarter filling. We show that, with a proper choice of the signs of hopping integrals, the ring-exchange mechanism yields ferromagnetic spin correlations between interchain neighboring sites and produces an attractive interaction between electrons as well as long-range pair correlations in the spin-triplet channel, thereby leading the system to triplet superconductivity. We argue that this mechanism may have possible relevance to the superconductivity observed in Bechgaard salts.