Complete d-band dispersion relation in sodium cobaltates

D. Qian, L. Wray, D. Hsieh, L. Viciu, R. J. Cava, J. L. Luo, D. Wu, N. L. Wang, M. Z. Hasan

    Research output: Contribution to journalArticle

    Abstract

    We utilize fine-tuned polarization selection coupled with excitation-energy variation of photoelectron signal to image the complete d-band dispersion relation in sodium cobaltates. A hybridization gap anticrossing is observed along the Brillouin zone corner and the full quasiparticle band is found to emerge as a many-body entity lacking a pure orbital polarization. At low dopings, the quasiparticle bandwidth (Fermion scale, many-body EF∼0.25eV) is found to be smaller than most known oxide metals. The low-lying density of states is found to be in agreement with bulk-sensitive thermodynamic measurements for nonmagnetic dopings where the 2D Luttinger theorem is also observed to be satisfied.

    Original languageEnglish (US)
    Article number186405
    JournalPhysical Review Letters
    Volume97
    Issue number18
    DOIs
    StatePublished - 2006

    Fingerprint

    sodium
    polarization
    Brillouin zones
    metal oxides
    photoelectrons
    theorems
    fermions
    bandwidth
    orbitals
    thermodynamics
    excitation
    energy

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Qian, D., Wray, L., Hsieh, D., Viciu, L., Cava, R. J., Luo, J. L., ... Hasan, M. Z. (2006). Complete d-band dispersion relation in sodium cobaltates. Physical Review Letters, 97(18), [186405]. https://doi.org/10.1103/PhysRevLett.97.186405

    Complete d-band dispersion relation in sodium cobaltates. / Qian, D.; Wray, L.; Hsieh, D.; Viciu, L.; Cava, R. J.; Luo, J. L.; Wu, D.; Wang, N. L.; Hasan, M. Z.

    In: Physical Review Letters, Vol. 97, No. 18, 186405, 2006.

    Research output: Contribution to journalArticle

    Qian, D, Wray, L, Hsieh, D, Viciu, L, Cava, RJ, Luo, JL, Wu, D, Wang, NL & Hasan, MZ 2006, 'Complete d-band dispersion relation in sodium cobaltates', Physical Review Letters, vol. 97, no. 18, 186405. https://doi.org/10.1103/PhysRevLett.97.186405
    Qian, D. ; Wray, L. ; Hsieh, D. ; Viciu, L. ; Cava, R. J. ; Luo, J. L. ; Wu, D. ; Wang, N. L. ; Hasan, M. Z. / Complete d-band dispersion relation in sodium cobaltates. In: Physical Review Letters. 2006 ; Vol. 97, No. 18.
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    AU - Wray, L.

    AU - Hsieh, D.

    AU - Viciu, L.

    AU - Cava, R. J.

    AU - Luo, J. L.

    AU - Wu, D.

    AU - Wang, N. L.

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