Coulomb Frustrated Phase Separation in Quasi-Two-Dimensional Organic Conductors on the Verge of Charge Ordering

Abstract

On the basis of an analysis of a 3/4-filled two-dimensional (2D) extended Hubbard model under the fluctuation-exchange approximation, we find Coulomb frustrated phase separation (PS) in a region of nonzero temperature, where the quantum critical phenomenon of charge ordering (CO) dominates. In quasi-2D organic conductors on the verge of CO, this frustrated PS provides a mechanism for generating spatial inhomogeneity, which is characterized by an extremely slow relaxation and an intermediate length scale.

4 pages, 4 figures

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• Long-Period Charge Correlations in Charge-Frustrated Molecular theta-(BEDT-TTF)2X
• Anomalous 2D-confined electronic transport in layered organic charge-glass systems
• Thermal algebraic-decay charge liquid driven by competing short-range Coulomb repulsion
• Charge fluctuations in the unconventional metallic state of Li0.9Mo6O17
• Finite Temperature Properties of Geometrically Charge Frustrated Systems
• H-wave -- A Python package for the Hartree-Fock approximation and the random phase approximation
• Kondo breakdown transitions and phase-separation tendencies in valence-fluctuating heavy-fermion materials