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

1 Scopus citations

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

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Keywords

  • Electronic structures
  • Pnictide

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