Open AccessCharge order and superconductivity in low‐dimensional organic conductors
Author(s) -
Kishigi Keita
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500016125
Subject(s) - superconductivity , condensed matter physics , charge density wave , antiferromagnetism , spin density wave , ground state , physics , cusp (singularity) , hubbard model , charge ordering , electrical conductor , scattering , electron , charge (physics) , maxima and minima , order (exchange) , quantum mechanics , geometry , mathematics , mathematical analysis , finance , economics
We study the coexistent state of the spin density wave (SDW) and the charge density wave (CDW) in a one‐dimensional extended Hubbard model. We find that the coexistent state of SDW and CDW is stabilized in various electron‐filling cases when band parameters are for organic conductors. The ground state energies have cusp‐like minima at n /4 m ‐fillings, where n and m are integers. The maxima of the critical temperatures of the coexistent state at n /4 m ‐fillings will be observed in X‐ray scattering measurements. We discuss the suitable filling for superconductivity of which strong fluctuation in antiferromagnetic ordering may be the origin.