Charge Ordering in Organic ET Compounds

Abstract

The charge ordering phenomena in quasi two-dimensional 1/4-filled organic compounds (ET)_2X (ET=BEDT-TTF) are investigated theoretically for the $\theta$ and $\alpha$-type structures, based on the Hartree approximation for the extended Hubbard models with both on-site and intersite Coulomb interactions. It is found that charge ordered states of stripe-type are stabilized for the relevant values of Coulomb energies, while the spatial pattern of the stripes sensitively depends on the anisotropy of the models. By comparing the results of calculations with the experimental facts, where the effects of quantum fluctuation is incorporated by mapping the stripe-type charge ordered states to the S=1/2 Heisenberg Hamiltonians, the actual charge patterns in the insulating phases of $\theta$-(ET)_2MM'(SCN)_4 and $\alpha$-(ET)_2I_3 are deduced. Furthermore, to obtain a unified view among the $\theta$, $\alpha$ and $\kappa$-(ET)_2X families, the stability of the charge ordered state in competition with the dimeric antiferromagnetic state viewed as the Mott insulating state, which is typically realized in $\kappa$-type compounds, and with the paramagnetic metallic state, is also pursued by extracting essential parameters.

35 pages, 27 figures, submitted to J. Phys. Soc. Jpn

Cited by in corpus (118)

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• Charge Ordering in alpha-(BEDT-TTF)2I3 by synchrotron x-ray diffraction
• Theoretical Aspects of Charge Ordering in Molecular Conductors
• First-Principles Study of Electronic Structure in $\alpha$-(BEDT-TTF)${}_2$I${}_3$ at Ambient Pressure and with Uniaxial Strain
• Observation of an anisotropic Dirac cone reshaping and ferrimagnetic spin polarization in an organic conductor
• Effects of the Zero-Mode Landau Level on Inter-Layer Magnetoresistance in Multilayer Massless Dirac Fermion Systems
• Electronic Ferroelectricity and Frustration
• Charge-cluster glass in an organic conductor
• Possible Verification of Tilted Anisotropic Dirac Cone in α-(BEDT-TTF)_2 I_3 Using Interlayer Magnetoresistance
• Charge ordering and antiferromagnetic exchange in layered molecular crystals of the theta type
• Large dielectric constant and giant nonlinear conduction in the organic conductor theta-(BEDT-TTF)_2CsZn(SCN)_4
• Quantum Melting of Charge Order due to Frustration in Two-Dimensional Quarter-Filled Systems
• Bond and charge density waves in the isotropic interacting two-dimensional quarter-filled band and the insulating state proximate to organic superconductivity
• Novel Charge Order and Superconductivity in Two-Dimensional Frustrated Lattice at Quarter Filling
• Anomalous Spin Correlations and Mass-Generating Excitonic Instability of Interacting Weyl Fermions
• Charge ordering in theta-(BEDT-TTF)_2 X materials
• Competition between Charge Ordering and Superconductivity in Layered Organic Conductors $\alpha$-(BEDT-TTF)${}_{2}M$Hg(SCN)${}_4$ (M = K, NH${}_4$)
• Insulating nature of strongly correlated massless Dirac fermions in an organic crystal
• Emergence of Dirac Electron Pair in Charge Ordered State of Organic Conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Collective excitation of electric dipole on molecular dimer in organic dimer-Mott insulator
• Molecular Quantum Materials: Electronic Phases and Charge Dynamics in Two-Dimensional Organic Solids
• Mean-field study of charge order with long periodicity in $\theta$-(BEDT-TTF)${}_2$X
• Quenching of charge and spin degrees of freedom in condensed matter
• Crystallization and vitrification of electrons in a glass-forming charge liquid
• Dynamical properties of a strongly correlated model for quarter-filled layered organic molecular crystals
• Metal-insulator transition and charge ordering in the extended Hubbard model at one-quarter filling
• Fulde-Ferrell-Larkin-Ovchinnikov state induced by antiferromagnetic order in $\kappa$-type organic conductors
• From charge- and spin-ordering to superconductivity in the organic charge-transfer solids
• Spontaneous breaking of isotropy observed in the electronic transport of rare-earth tritellurides
• Charge order and antiferromagnetism in the extended Hubbard model
• Evidence for electronically-driven ferroelectricity in the family of strongly correlated dimerized BEDT-TTF molecular conductors
• The Origin of the Charge Ordering and Its Relevance to Superconductivity in $\theta$-(BEDT-TTF)${}_2$X: The Effect of the Fermi Surface Nesting and the Distant Electron-Electron Interactions
• Charge order and superconductivity in a two-dimensional triangular lattice at n=2/3
• Growth Dynamics of Photoinduced Domains in Two-Dimensional Charge-Ordered Conductors Depending on Stabilization Mechanisms
• Ambient pressure Dirac electron system in quasi-two-dimensional molecular conductor $\alpha$-(BETS)${}_2$I${}_3$
• Inter-Band Effects of Magnetic Field on Hall Conductivity in Multi Layered Massless Dirac Fermion System $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Charge Order with Structural Distortion in Organic Conductors: Comparison between θ-(ET)2RbZn(SCN)4 and α-(ET)2I3
• Crossover from Positive to Negative Interlayer Magnetoresistance in Multilayer Massless Dirac Fermion System with Non-Vertical Interlayer Tunneling
• Emergence of non-equilibrium charge dynamics in a charge-cluster glass
• Charge ordering and coexistence of charge fluctuations in quasi-two-dimensional organic conductors $\theta$-(BEDT-TTF)${}_{2}X$
• Non-Fermi liquid behavior in nearly charge ordered layered metals
• 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
• Phase Competition and Superconductivity in $\kappa$-(BEDT-TTF)${}_2$X: Importance of Intermolecular Coulomb Interactions
• Charge ordering in θ-(BEDT-TTF)2RbZn(SCN)4: Cooperative effects of electron correlations and lattice distortions
• Magnetoplasmons of the tilted-anisotropic Dirac cone material $\alpha -$(BEDT-TTF)${}_2$I${}_3$
• Effects of Electron-Lattice Coupling on Charge Order in θ-(ET)2X
• Systematic Variations in the Charge-Glass-Forming Ability of Geometrically Frustrated $\theta$-(BEDT-TTF)${}_{2}X$ Organic Conductors
• ${}^{13}$C NMR Study on the Charge-Disproportionated Conducting State in the Quasi-Two-Dimensional Organic Conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• First-principles study of the effective Hamiltonian for Dirac fermions with spin-orbit coupling in two-dimensional molecular conductor $\alpha$-(BETS)${}_2$I${}_3$
• Geometrical frustration effects on charge-driven quantum phase transitions
• Mechanism of superconductivity and electron-hole doping asymmetry in $\kappa$-type molecular conductors
• Correlation Effects on Charge Order and Zero-Gap State in the Organic Conductor α-(BEDT-TTF)2I3
• Spin and Charge Fluctuations and Lattice Effects on Charge Orders in α-(BEDT-TTF)_2I_3
• Berry Curvature of the Dirac Particle in $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Charge Fluctuations in Geometrically Frustrated Charge Ordering System
• Theoretical Aspects of Charge Correlations in $\theta$-(BEDT-TTF)${}_{2}X$
• Transport properties of organic Dirac electron system α-(BEDT-TSeF)${}_2$I${}_3$
• Enhancement of Spin Susceptibility near Charge-Ordering Transition in a Two-Dimensional Extended Hubbard Model
• Observation of Possible Nonlinear Anomalous Hall Effect in Organic Two-Dimensional Dirac Fermion System
• Charge orders in organic charge-transfer salts
• Spin excitations in the quasi-two-dimensional charge-ordered insulator $\alpha$-(BEDT-TTF)${}_2$I${}_3$ probed via ${}^{13}$C NMR
• Effects of Zeroline and Ferrimagnetic Fluctuation on Nuclear Magnetic Resonance for Dirac Electrons in Molecular Conductor alpha-(BEDT-TTF)2I3
• Interaction-induced quantum spin Hall insulator in the organic Dirac electron system $\alpha$-(BEDT-TSeF)${}_2$I${}_3$
• Intersite Coulomb Interactions in Charge Ordered Systems
• Long-Period Charge Correlations in Charge-Frustrated Molecular theta-(BEDT-TTF)2X
• Strong light-field effects driven by nearly single-cycle 7-fs light field in correlated organic conductors
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• Three-quarter Dirac points, Landau levels and magnetization in $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Exact solution of the 1D Hubbard model with NN and NNN interactions in the narrow-band limit
• Quantum Phase Transition in Organic Massless Dirac Fermion System $\alpha$-(BEDT-TTF)${}_2$I${}_3$ under pressure
• Superconductivity in the vicinity of charge ordered state in organic conductor beta-(meso-DMBEDT-TTF)_2PF_6
• Spin exchange and superconductivity in a $t-J^{\prime }-V$ model for two-dimensional quarter-filled systems
• Gap opening mechanism for correlated Dirac electrons in organic compounds $\alpha$-(BEDT-TTF)${}_2$I${}_3$ and $\alpha$-(BEDT-TSeF)${}_2$I${}_3$
• Anomalous 2D-confined electronic transport in layered organic charge-glass systems
• Charge Ordered Insulator without Magnetic Order Studied by Correlator Projection Method
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• Comprehensive $ab$ $initio$ investigation of the phase diagram of quasi-one-dimensional molecular solids
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• Anomalous Spin Transport Properties of Gapped Dirac Electrons with Tilting
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• Effect of Coulomb Interaction on Seebeck Coefficient of Organic Dirac Electron System $\alpha$-(BEDT-TTF)${}_2$I${}_3$
• Single-component molecular material hosting antiferromagnetic and spin-gapped Mott subsystems
• Role of Interlayer Electron Hopping for Spin Density Wave State in the Zero-Gap Organic Conductor
• Interplay between Structure and Electronic Properties in Organic Conductors
• Self-organization of charge under pressure in the organic conductor (TMTSF)2ReO4
• Evidence for three-dimensional Dirac semimetal state in strongly correlated organic quasi-two-dimensional material
• Bipolaron Density-Wave Driven By Antiferromagnetic Correlations and Frustration in Organic Superconductors
• Dynamical phase transitions in the photodriven charge-ordered Dirac-electron system
• Electronic State and Optical Response in a Hydrogen-Bonded Molecular Conductor
• De Haas-van Alphen oscillations near the Lifshitz transition from two electron pockets to one electron pocket in the two-dimensional Dirac fermion systems
• Correlated Zak insulator in organic antiferromagnets
• Spin-Ordered States in Multilayer Massless Dirac Fermion Systems
• Dirac Electrons in Molecular Solids
• Particle-Hole Asymmetry and Pinball Liquid in a Triangular-Lattice Extended Hubbard Model within Mean-Field Approximation
• Pressure-induced topological changes in Fermi surface of two-dimensional molecular conductor
• Upper critical field divergence induced by mesoscopic phase separation in the organic superconductor (TMTSF)2ReO4
• Effect of Interlayer Spin-Flip Tunneling for Interlayer Magnetoresistance in Multilayer Massless Dirac Fermion Systems
• Observations of $\nu =1$ Quantum Hall Effect and Inter-Band Effects of Magnetic fields on Hall Conductivity in Organic Massless Dirac Fermion System $\alpha$-(BETS)${}_2$I${}_3$ under Pressure
• Possibility of BCS-BEC crossover in $\kappa$-type organic superconductors
• Possible Spin-Density Wave on Fermi Arc of Edge State in Single-Component Molecular Conductors [Pt(dmdt)${}_2$] and [Ni(dmdt)${}_2$]
• Enhancements of the 3/2 and 5/2 frequencies of de Haas-van Alphen oscillations near the Lifshitz transition in the two-dimensional compensated metal with overtilted Dirac cones
• Time-Reversal Symmetry-Breaking Flux State in an Organic Dirac Fermion System
• Algebraic structure of Dirac fermion state in α-(BDET-TTF)_2I_3
• Absence of superconductivity in the Hubbard dimer model for kappa-(BEDT-TTF)_2X
• Charge-localization-driven metal-insulator phase transition in layered molecular conductors
• Role of hydrogen bonding in charge-ordered organic conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$ probed by ${}^{127}$I nuclear quadrupole resonance
• Fragment-orbital-dependent spin fluctuations in the single-component molecular conductor [Ni(dmdt)${}_2$]
• Coexisting orders in the quarter-filled Hubbard chain with elastic deformations
• Stability of correlated insulating states in molecular conductors from first-principles calculation
• Dynamical Cluster Approximation Study of Electron Localization in the Extended Hubbard Model