Low energy electronic structures in electron-doped and hole-doped superconducting (Ba/K)(Fe/Co) 2As 2

D. Qian, Y. Xia, L. Wray, D. Hsieh, M. Z. Hasan

    Research output: Contribution to journalArticle

    Abstract

    Systematic high resolution angle-resolved photoemission spectroscopic studies have been performed on the optimally electron-doped BaFe 1.82Co 0.18As 2 (T c = 24 K) and hole-doped Ba 0.6K 0.4Fe 2As 2 (T c = 37 K) superconductors. The superconducting gap is nearly isotropic in momentum space. Utilizing different experimental geometries, the detailed electronic band structures were determined experimentally and compared with first principle LDA calculations. The overall bandwidth is reduced by a factor of 2. However, the low energy quasiparticle dispersions near zone corner exhibit stronger renormalization by a factor of 4-5. k z dependence was observed on the electron pockets at zone corner.

    Original languageEnglish (US)
    Pages (from-to)617-619
    Number of pages3
    JournalJournal of Superconductivity and Novel Magnetism
    Volume23
    Issue number5
    DOIs
    StatePublished - Jul 1 2010

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    Keywords

    • Electronic structures
    • Pnictide

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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