Effect of Dynamical Coulomb Correlations on the Fermi Surface of Na_0.3CoO_2

Abstract

The t2g quasi-particle spectra of Na_0.3CoO_2 are calculated within the dynamical mean field theory. It is shown that as a result of dynamical Coulomb correlations charge is transfered from the nearly filled e_g' subbands to the a_1g band, thereby reducing orbital polarization among Co t2g states. Dynamical correlations therefore stabilize the small e_g' Fermi surface pockets, in contrast to angle-resolved photoemission data, which do not reveal these pockets.

4 pages, to appear in PRL

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Cited by in corpus (41)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• High-spin to low-spin and orbital polarization transitions in multiorbital Mott systems
• Ab initio analysis of the tight-binding parameters and magnetic interactions in Na2IrO3
• LDA+Gutzwiller Method for Correlated Electron Systems: Formalism and Its Applications
• Temperature and bath size in exact diagonalization dynamical mean field theory
• Ferromagnetism, paramagnetism and a Curie-Weiss metal in an electron doped Hubbard model on a triangular lattice
• Complete d-Band Dispersion and the Mobile Fermion Scale in NaxCoO2
• Quasiparticle coherence and the nature of the metal-insulator phase transition in Na${}_x$CoO${}_2$
• Effect of Crystal-Field Splitting and Inter-Band Hybridization on the Metal-Insulator Transitions of Strongly Correlated Systems
• Fermi surface and quasiparticle excitations of Sr${}_2$RhO${}_4$
• Exact Diagonalization Dynamical Mean Field Theory for Multi-Band Materials: Effect of Coulomb correlations on the Fermi surface of Na_0.3CoO_2
• Destruction of the small Fermi surfaces in Na${}_x$CoO${}_2$ by Na disorder
• Enhancement of the Na${}_x$CoO${}_2$ thermopower due to electronic correlations
• 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
• Mottness on a triangular lattice
• The low-energy ARPES and heat capacity of Na${}_{0.3}$CoO${}_2$: A DMFT study
• Shubnikov de Haas effect in the metallic state of Na${}_{0.3}$CoO${}_2$
• Itinerant in-plane magnetic fluctuations and many-body correlations in Na${}_x$CoO${}_2$
• Efficient fluctuation exchange approach to low-temperature spin fluctuations and superconductivity: from the Hubbard model to Na${}_x$CoO${}_2\cdot y$H${}_2$O
• Sr${}_2$(Ba${}_2$)VO${}_4$ under pressure -- an orbital switch and potential $d^1$ superconductor
• Effects of electronic correlations and disorder on the thermopower of NaxCoO2
• Na${}_x$CoO${}_2$ in the x -> 0 Regime: Coupling of Structure and Correlation effects
• Experimental study of the incoherent spectral weight in the photoemission spectra of the misfit cobaltate [Bi2Ba2O4][CoO2]2
• Effective Hamiltonian for transition-metal compounds. Application to Na_xCoO_2
• Dynamical mean field theory of an effective three-band model for Na${}_x$CoO${}_2$
• Coulomb correlations do not fill the e'_g hole pockets in Na_{0.3}CoO_2
• Itinerant and localized magnetism on the triangular lattice: sodium rich phases of Na${}_x$CoO${}_2$
• Electronic structure and Fermi surface tolopogy of Na${}_x$CoO${}_2$
• Textured electronic states of the triangular lattice Hubbard model and Na${}_x$CoO${}_2$
• The electronic structure of the Na${}_x$CoO${}_2$ surface
• The origin of a${}_{1g}$ and e${}_g$' orderings in Na${}_x$CoO${}_2$
• Spin fluctuations, magnetic long-range order and Fermi surface gapping in NaxCoO2
• Electron-phonon interaction in the lamellar cobaltate Na${}_x$CoO${}_2$
• s-wave Superconductivity due to Suhl-Kondo Mechanism in Na${}_x$CoO${}_2\cdot y$H${}_2$O: Effect of Coulomb Interaction and Trigonal Distortion
• Effect of covalency and interactions on the trigonal splitting in NaxCoO2
• Dynamical magnetic susceptibility in the lamellar cobaltate superconductor Na_xCoO_2$\cdot y$H_2O
• Role of electronic correlations in the Fermi surface formation of Na${}_x$CoO${}_2$
• Hard x-ray spectroscopy in NaxCoO2 and superconducting NaxCoO2 - yH2O: A view on the bulk Co electronic properties
• Enhancement of the effective disorder potential and the thermopower in Na${}_x$CoO${}_2$ through the electron-phonon coupling
• Evolution of electron Fermi surface with doping in cobaltates