Superconductivity in Na_xCoO_2yH_2O by charge fluctuation

Abstract

A new mechanism for superconductivity in the newly discovered Co-based oxide is proposed by using charge fluctuation. A single-band extended Hubbard model on the triangular lattice is studied within random phase approximation. $f$-wave triplet superconductivity is stabilized in the vicinity of charge-density-wave instability, which is in sharp contrast with the square-lattice case. The physical origin of the realization of the $f$-wave triplet state as well as the relevance to experiments are discussed.

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Cited by in corpus (46)

• Theoretical Aspects of Charge Ordering in Molecular Conductors
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• Possible spin-triplet $f$-wave pairing due to disconnected Fermi surfaces in Na${}_x$CoO${}_2\cdot y$H${}_2$O
• Quantum Melting of Charge Order due to Frustration in Two-Dimensional Quarter-Filled Systems
• Spin singlet pairing in the superconducting state of NaxCoO2\cdot1.3H2O: evidence from a ^{59}Co Knight shift in a single crystal
• Multi-orbital analysis on the Superconductivity in Na_{x}CoO_{2} \cdot y H_{2}O
• Pairing Symmetry Competition in Organic Superconductors
• Microscopic theory of spin-triplet $f$-wave pairing in quasi-1D organic superconductors
• Evidence of nodal superconductivity in Na_0.35CoO2-1.3H_2O: a specific heat study
• Low energy electronic states and triplet pairing in layered cobaltates
• 59Co-NMR Knight Shift of Aligned Crystals and Polycrystalline Samples of Superconducting Na0.3CoO2.1.3H2O
• 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
• Variational Monte Carlo Studies of Pairing Symmetry for the t-J Model on a Triangular Lattice
• Charge order and superconductivity in a two-dimensional triangular lattice at n=2/3
• Competition between singlet and triplet pairings in Na_xCoO_2 yH_2O
• Non-Fermi liquid behavior in nearly charge ordered layered metals
• The effect of interchain interaction on the pairing symmetry competition in organic superconductors (TMTSF)${}_2$X
• First principles lattice dynamics of NaCoO${}_2$
• Ferromagnetic and triplet-pairing instabilities controlled by the trigonal distortion of the CoO_6 octahedra in Na_xCoO_2*yH_2O
• Geometrical frustration effects on charge-driven quantum phase transitions
• Magnetic properties of superconducting cobalt oxides NaxCoO2.yH2O
• Na${}_x$CoO${}_2$ in the x -> 0 Regime: Coupling of Structure and Correlation effects
• Theoretical Aspects of Charge Correlations in $\theta$-(BEDT-TTF)${}_{2}X$
• Role of spin-orbit coupling on the spin triplet pairing in Na_{x}CoO_{2}yH_{2}O I: d-vector under zero magnetic field
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• Superconducting pairing symmetry on the extended Hubbard model in the presence of the Rashba-type spin-orbit coupling
• Search for Magnetic Excitation Spectra of NaxCoO2.yD2O -Neutron Scattering-
• Role of spin-orbit coupling on the spin triplet pairing in Na_{x}CoO_{2}yH_{2}O II: Multiple phase diagram under the magnetic field
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• Bond-ordered states and $f$-wave pairing of spinless fermions on the honeycomb lattice
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• Pairing mechanism of unconventional superconductivity in doped Kane-Mele model
• Superconductivity in the Three-Fold Charge-Ordered Metal of the Triangular-Lattice Extended Hubbard Model
• Andreev Edge State on Semi-Infinite Triangular Lattice: Detecting the Pairing Symmetry in Na_0.35CoO_2.yH_2O
• Proton incorporations and superconductivity in a cobalt oxyhydrate
• Evidence the ferromagnetic order on CoSb layer of LaCoSb${}_2$
• Variational Monte Carlo studies of a t-J model on an anisotropic triangular lattice
• Identifying the pairing symmetry in sodium cobalt oxide by Andreev edge states
• One-particle spectral properties of the t-J-$V$ model on the triangular lattice near charge order
• $d_{x^2-y^2}$-wave density wave and $d_{x^2-y^2}$-wave superconducting gap on the extended Hubbard model on a square lattice
• Possible Electric-Field-Induced Superconducting States in Doped Silicene
• Absence of spin susceptibility decrease in a bulk organic superconductor with triangular lattice
• Density Matrix Renormalization Group study of superconducting pairing near the quarter-filled Wigner crystal