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We study theoretically competition between the charge ordering and thesuperconductivity in two-dimensional organic conductorbeta-(meso-DMBEDT-TTF)_2PF_6. We analyze the extended Hubbard model on aweakly-dimerized lattice based on the random phase approximation and Eliashbergequations. We found reentrant behavior of the checkerbord-type charge-orderedphase in the phase diagram, and the triplet superconductivity due to the chargefluctuation in the neighboring region. In the low temperature and high pressureregion, the singlet superconductivity also appears due to the enhancement ofthe spin fluctuation.Comment: 7 pages, 13 figures, submitted to JPS

Superconductivity in the Vicinity of Charge Ordered State in Organic Conductor β-(meso-DMBEDT-TTF)2PF6

Superconductivity in the Vicinity of Charge Ordered State in Organic Conductor β-(meso-DMBEDT-TTF)₂PF₆