Superconductivity in the vicinity of charge ordered state in organic conductor beta-(meso-DMBEDT-TTF)_2PF_6

Abstract

We study theoretically competition between the charge ordering and the superconductivity in two-dimensional organic conductor beta-(meso-DMBEDT-TTF)_2PF_6. 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.

7 pages, 13 figures, submitted to JPSJ

References in corpus (4)

• Charge Ordering in Organic ET Compounds
• Mean-field study of charge order with long periodicity in $\theta$-(BEDT-TTF)${}_2$X
• Charge fluctuation induced superconducting state in two-dimensional quarter-filled electron systems
• Perturbation Theory on the Transition Temperature and Electronic Properties of Organic Superconductor

Cited by in corpus (6)

• Enhancement of Spin Susceptibility near Charge-Ordering Transition in a Two-Dimensional Extended Hubbard Model
• Superconducting pairing symmetry on the extended Hubbard model in the presence of the Rashba-type spin-orbit coupling
• Quantum Monte Carlo Study of the Quasi-One-Dimensional Superconductivity
• H-wave -- A Python package for the Hartree-Fock approximation and the random phase approximation
• Fermi Surface Deformation near Charge-Ordering Transition
• Charge order and possible bias-induced metastable state in the organic conductor β-(meso-DMBEDT-TTF)2PF6: effects of structural distortion