Abstract
Charge fluctuations in the quasi-one-dimensional material are analyzed based on a multiorbital extended Hubbard model. A charge-ordering transition induced by Coulomb repulsion is found with a particular charge-ordering pattern. The metallic phase is characterized by the presence of a charge collective mode which softens signaling the proximity to the charge order transition. We argue that the scattering between electrons mediated by these charge fluctuations can lead to non-Fermi liquid behavior in a quasi-one-dimensional system consistent with the unconventional metallic behavior observed above the superconducting transition in .
- Received 17 June 2014
- Revised 11 January 2015
DOI:https://doi.org/10.1103/PhysRevB.91.035135
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