2006/08/31 by K. Yoshimi, Kazuyoshi Yoshimi, Masaaki Nakamura +3 · 12 citations
Materials Science · Physics and Astronomy · #Charge (physics) #Charge ordering #Condensed matter physics #Conductor #Hubbard model #Lattice (music) #Magnetism in coordination complexes #Materials science #Organic and Molecular Conductors Research #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Singlet state #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1143/jpsj.76.024706
published in Journal of the Physical Society of Japan 76(2), 024706 (Physical Society of Japan) · 7 pages, 13 figures, submitted to JPSJ
openalex publication_date 2007/01/25 · arxiv created 2007/02/08 · arxiv updated 2015/06/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study theoretically competition between the charge ordering and the superconductivity in two-dimensional organic conductor beta-(meso-DMBEDT-TTF)2PF6. We analyze the extended Hubbard model on a weakly-dimerized lattice based on the random phase approximation and Eliashberg equations. We found reentrant behavior of the checkerbord-type charge-ordered phase in the phase diagram, and the triplet superconductivity due to the charge fluctuation in the neighboring region. In the low temperature and high pressure region, the singlet superconductivity also appears due to the enhancement of the spin fluctuation.