The Fermi surface of Na${}_x$CoO${}_2$

Abstract

Doping evolution of the Fermi surface topology of Na${}_x$CoO${}_2$ is studied systematically. Both local density approximation (LDA) and local spin density approximation (LSDA) predict a large Fermi surface as well as small hole pockets for doping levels $x\sim$ 0.5. In contrast, the hole pockets are completely absent for all doping levels within LSDA+U. More importantly, we find no violation of Luttinger's rule in this system, contrary to a recent suggestion. The measured Fermi surface of Na${}_{0.7}$CoO${}_2$ can be explained by its half-metallic behavior and agrees with our LSDA+U calculations.

References in corpus (11)

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• Fermi surface and quasiparticle dynamics of Na(x)CoO2 {x=0.7} investigated by Angle-Resolved Photoemission Spectroscopy
• Unconventional magnetic transition and transport behavior in Na0.75CoO2
• ARPES on Na${}_{0.6}$CoO${}_2$: Fermi surface, extended flat dispersion, and unusual band splitting
• Charge Disproportionation and Spin Ordering Tendencies in Na(x)CoO2
• Static magnetic order in Na${}_{0.75}$CoO${}_2$ detected by muon spin rotation and relaxation
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• Doping effects on the electronic and structural properties of CoO2: An LSDA+U study
• Nesting, spin-fluctuations, and odd-gap superconductivity in NaxCoO2 yH2O
• The Role of hybridization in NaxCoO2 and the Effect of Hydration
• Electronic States in Two-Dimensional Triangular Cobalt Oxides: Role of Electronic Correlation

Cited by in corpus (35)

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• Ferromagnetism, paramagnetism and a Curie-Weiss metal in an electron doped Hubbard model on a triangular lattice
• Electronic phase diagram of the layered cobalt oxide system, LixCoO2 (0.0 <= x <= 1.0)
• Electron correlation and Fermi surface topology of Na${}_x$CoO${}_2$
• Orbital Symmetry and Electron Correlation in Na_{x}CoO_2
• Complete d-Band Dispersion and the Mobile Fermion Scale in NaxCoO2
• Effect of Dynamical Coulomb Correlations on the Fermi Surface of Na_0.3CoO_2
• Angle-resolved photoemission study of cobalt oxide superconductor NaxCoO2.yH2O : Observation of the Fermi surface
• Destruction of the small Fermi surfaces in Na${}_x$CoO${}_2$ by Na disorder
• Phase Diagram of Na${}_x$CoO${}_2$ Studied by Gutzwiller Density Functional Theory
• Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides
• Shubnikov de Haas effect in the metallic state of Na${}_{0.3}$CoO${}_2$
• Electronic structure of the $\mathrm{C}{\mathrm{a}}_3\mathrm{C}{\mathrm{o}}_4{\mathrm{O}}_9$ compound from ab initio local interactions
• Precise Control of Band Filling in NaxCoO2
• Itinerant in-plane magnetic fluctuations and many-body correlations in Na${}_x$CoO${}_2$
• Structural and transport properties of epitaxial NaxCoO2 thin films
• Electron-boson mode coupling and the pseudogap of Na${}_x$CoO${}_2$ by infrared spectroscopy
• Na${}_x$CoO${}_2$ in the x -> 0 Regime: Coupling of Structure and Correlation effects
• Effective Hamiltonian for transition-metal compounds. Application to Na_xCoO_2
• Optical Study of the Electronic Structure and Correlation Effects in K0.49RhO2
• Dynamical mean field theory of an effective three-band model for Na${}_x$CoO${}_2$
• Itinerant and localized magnetism on the triangular lattice: sodium rich phases of Na${}_x$CoO${}_2$
• Interplay of frustration, magnetism, charge ordering, and covalency in a model of Na0.5CoO2
• Cooperative effect of phonons and electronic correlations for superconductivity in cobaltates
• Effect of covalency and interactions on the trigonal splitting in NaxCoO2
• Magnetic Phase Transition at 88 K in Na0.5CoO2 revealed by 23Na-NMR investigations
• Electron-phonon interaction dressed by electronic correlations near charge ordering as the origin for superconductivity in cobaltates
• Origin of the electron disproportionation in the metallic sodium cobaltates
• Role of electronic correlations in the Fermi surface formation of Na${}_x$CoO${}_2$
• Influence of water intercalation on the electronic structure of the hydrated Na0.3CoO2.yH2O using a local spin density approximation
• A first principles study on FeAs single layers
• Evolution of electron Fermi surface with doping in cobaltates
• Ab-initio studying of spin states of sodium cobaltate Na${}_{2/3}$CoO${}_2$
• Optical properties of the Holstein-t-J model from dynamical mean-field theory