Non-Fermi liquid behavior in nearly charge ordered layered metals

Abstract

Non-Fermi liquid behavior is shown to occur in two-dimensional metals which are close to a charge ordering transition driven by the Coulomb repulsion. A linear temperature dependence of the scattering rate together with an increase of the electron effective mass occur above T*, a temperature scale much smaller than the Fermi temperature. It is shown that the anomalous temperature dependence of the optical conductivity of the quasi-two-dimensional organic metal alpha-(BEDT-TTF)2MHg(SCN)4, with M=NH4 and Rb, above T*=50-100 K, agrees qualitatively with our predictions for the electronic properties of nearly charge ordered two-dimensional metals.

accepted in Phys. Rev. Lett

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Cited by in corpus (22)

• Electrodynamics of Correlated Electron Materials
• Bandwidth tuning triggers interplay of charge order and superconductivity in two-dimensional organic materials
• Electronic properties of correlated metals in the vicinity of a charge order transition: optical spectroscopy of $\alpha$-(BEDT-TTF)${}_{2}M$Hg(SCN)${}_4$ ($M$ = NH${}_4$, Rb, Tl)
• Antiferromagnetic states and phase separation in doped AA-stacked graphene bilayers
• Coexistence of distinct charge fluctuations in $\theta$-(BEDT-TTF)${}_2$X
• Charge, Lattice, and Spin Dynamics in Photoinduced Phase Transitions from Charge-Order-Insulator to Metal in Quasi-Two-Dimensional Organic Conductors
• Non-local correlations in metals close to a charge order insulator transition
• Quantum critical behavior of electrons at the edge of charge order
• Charge-order fluctuations and superconductivity in two-dimensional organic metals
• Geometrical frustration effects on charge-driven quantum phase transitions
• Enhancement of Spin Susceptibility near Charge-Ordering Transition in a Two-Dimensional Extended Hubbard Model
• 13C NMR study of superconductivity near charge instability realized in beta"-(BEDT-TTF)4[(H3O)Ga(C2O4)3]C6H5NO2
• Coulomb Frustrated Phase Separation in Quasi-Two-Dimensional Organic Conductors on the Verge of Charge Ordering
• DC and high-frequency conductivity of the organic metals beta"-(BEDT-TTF)2SF5RSO3 (R = CH2CF2 and CHF)
• Microscopic coexistence of superconductivity and charge order in organic superconductor ${\beta }^{\prime \prime }$-(BEDT-TTF)${}_4$[(H${}_3$O)Ga(C${}_2$O${}_4$)${}_3$]$\cdot$C${}_6$H${}_5$NO${}_2$
• Triplet superconductivity in a model of Li${}_{0.9}$Mo${}_6$O${}_{17}$
• Role of dynamical non-double-occupancy excitations on the quasiparticle damping of the $t-J$ model in the large-$N$ limit
• Charge fluctuations in the unconventional metallic state of Li0.9Mo6O17
• Charge imbalance in $\lambda$-(BETS)${}_2$GaCl${}_4$ and their interplay with superconductivity
• Fermi Surface Deformation near Charge-Ordering Transition
• One-particle spectral properties of the t-J-$V$ model on the triangular lattice near charge order
• Finite-Temperature Properties across the Charge Ordering Transition -- Combined Bosonization, Renormalization Group, and Numerical Methods