Electronic structure of heavily electron-doped BaFe1.7Co 0.3AS2 studied by angle-resolved photoemission

Y. Sekiba, T. Sato, K. Nakayama, K. Terashima, P. Richard, J. H. Bowen, H. Ding, Y. M. Xu, L. J. Li, G. H. Cao, Z. A. Xu, T. Takahashi

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Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy on heavily electron-doped non-superconducting (SC) BaFe1.7Co 0.3As2. We find that the two hole Fermi surface pockets at the Brillouin zone center observed in the hole-doped superconducting Ba 0.6K0.4Fe2As2 are absent or very small in this compound, while the two electron pockets at the zone corner significantly expand due to electron doping by the Co substitution. Comparison of the Fermi surface between non-SC and SC samples indicates that the coexistence of hole and electron pockets connected via the antiferromagnetic wave vector is essential in realizing the mechanism of superconductivity in the iron-based superconductors.

Original languageEnglish
Article number025020
JournalNew Journal of Physics
Volume11
DOIs
Publication statusPublished - Feb 27 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Sekiba, Y., Sato, T., Nakayama, K., Terashima, K., Richard, P., Bowen, J. H., Ding, H., Xu, Y. M., Li, L. J., Cao, G. H., Xu, Z. A., & Takahashi, T. (2009). Electronic structure of heavily electron-doped BaFe1.7Co 0.3AS2 studied by angle-resolved photoemission. New Journal of Physics, 11, [025020]. https://doi.org/10.1088/1367-2630/11/2/025020