Charge order and superconductivity in a two-dimensional triangular lattice at n=2/3

Abstract

To investigate the possibility of charge order and superconductivity in a doped two-dimensional triangular lattice, we study the extended Hubbard model with variational Monte Carlo method. At n=2/3, a commensurate filling for a triangular lattice, it is shown that the nearest-neighbor Coulomb interaction V induces honeycomb-type charge order and antiferromagnetic spin order at U>10t. We also discuss the possibility of superconductivity induced by charge fluctuation and the relation to the superconductivity in Na_{0.35}CoO_{2}1.3H_{2}O and theta-type organic condoctors.

4 pages, 5 figures

References in corpus (21)

• Charge-ordering, commensurability and metallicity in the phase diagram of layered Na(x)CoO(2)
• Charge Ordering in Organic ET Compounds
• An Electronic Model for $Co{O}_2$ layer based systems: Chiral RVB metal and Superconductivity
• Fermi surface and quasiparticle dynamics of Na(x)CoO2 {x=0.7} investigated by Angle-Resolved Photoemission Spectroscopy
• Superconductivity mediated by charge fluctuations in layered molecular crystals
• Superconductivity in CoO${}_2$ Layers and the Resonating Valence Bond Mean Field Theory of the Triangular Lattice t-J model
• Doped t-J Model on a Triangular Lattice: Possible Application to Na${}_x$CoO${}_2\cdot y$H${}_2$0 and Na${}_{1-x}$TiO${}_2$
• ARPES on Na${}_{0.6}$CoO${}_2$: Fermi surface, extended flat dispersion, and unusual band splitting
• Superconducting states in frustrating t-J model: A model connecting high-$T_c$ cuprates, organic conductors and Na${}_x$CoO${}_2$
• Instabilities of interacting electrons on the triangular lattice
• Possible effects of charge frustration in Na${}_x$CoO${}_2$: bandwidth suppression, charge orders and resurrected RVB superconductivity
• Ferromagnetic fluctuation and possible triplet superconductivity in Na_xCoO_2*yH_2O: Fluctuation-exchange study of multi-orbital Hubbard model
• Crossover of superconducting properties and kinetic-energy gain in two-dimensional Hubbard model
• Charge ordering and antiferromagnetic exchange in layered molecular crystals of the theta type
• Possible spin-triplet $f$-wave pairing due to disconnected Fermi surfaces in Na${}_x$CoO${}_2\cdot y$H${}_2$O
• Superconductivity in Na_xCoO_2yH_2O by charge fluctuation
• Multi-orbital analysis on the Superconductivity in Na_{x}CoO_{2} \cdot y H_{2}O
• Possibility of f-wave spin-triplet superconductivity in the CoO superconductor: a case study on a 2D triangular lattice in the repulsive Hubbard model
• Study of the triangular lattice tV model near x=1/3
• Charge fluctuation induced superconducting state in two-dimensional quarter-filled electron systems
• Cooperative effect of phonons and electronic correlations for superconductivity in cobaltates

Cited by in corpus (29)

• Electrodynamics of Correlated Electron Materials
• Theoretical Aspects of Charge Ordering in Molecular Conductors
• Slave spin cluster mean field theory away from half-filling: Application to the Hubbard and the extended Hubbard Model
• Novel Charge Order and Superconductivity in Two-Dimensional Frustrated Lattice at Quarter Filling
• Phase diagram of the triangular extended Hubbard model
• Competition between charge and spin order in the $t-U-V$ extended Hubbard model on the triangular lattice
• Charge and spin order on the triangular lattice -- Na${}_x$CoO${}_2$ at $x=0.5$
• Effective Hamiltonian for the electronic properties of the quasi-one-dimensional material Li0.9Mo6O17
• Correlation Effects on Charge Order and Zero-Gap State in the Organic Conductor α-(BEDT-TTF)2I3
• Loop-Cluster Simulation of the $t$-$J$ Model on the Honeycomb Lattice
• Correlation-driven charge order in a frustrated two-dimensional atom lattice
• Complex magnetic and spatial symmetry breaking from correlations in kagome flat bands
• Single-hole properties of the t-J model on the honeycomb lattice
• Probing magnetism in moiré heterostructures with quantum twisting microscopes
• 13C NMR study of superconductivity near charge instability realized in beta"-(BEDT-TTF)4[(H3O)Ga(C2O4)3]C6H5NO2
• Noncollinear and noncoplanar magnetic order in the extended Hubbard model on anisotropic triangular lattice
• Systematic Effective Field Theory Investigation of Spiral Phases in Hole-Doped Antiferromagnets on the Honeycomb Lattice
• Charge ordered phases in the hole-doped triangular Mott insulator 4Hb-TaS2
• Bond-ordered states and $f$-wave pairing of spinless fermions on the honeycomb lattice
• Spontaneous symmetry breaking in correlated wave functions
• Theory of carrier concentration-dependent electronic behavior in layered cobaltates
• Doped Mott phase and charge correlations in monolayer 1T-NbSe${}_2$
• Superconductivity in the Three-Fold Charge-Ordered Metal of the Triangular-Lattice Extended Hubbard Model
• Emergent lattices with geometrical frustration in doped extended Hubbard models
• Charge and spin properties of a generalized Wigner crystal realized in the moiré WSe${}_2$/WS${}_2$ heterobilayer
• Effect of hole doping on the 120 degree order in the triangular lattice Hubbard model: A Hartree-Fock revisit
• Particle-Hole Asymmetry and Pinball Liquid in a Triangular-Lattice Extended Hubbard Model within Mean-Field Approximation
• Ground state and spectral properties across a Charge Density Wave transition in a triangular-lattice spinless Fermion model
• Itinerant magnetism in Hubbard models with long-range interactions