Electronic structure of the iron arsenic parent compound LaFeAsO studied by angle resolved photoemission spectroscopy

ORAL

Abstract

The current availability of millimeter-sized single crystals of LaFeAsO opened the door to the detailed investigation on the physical properties of this iron pnictide parent compound. In this talk we report our latest results on the electronic structure of this material measured by angle resolved photoemission spectroscopy (ARPES) with special focus on the observation of a surface-driven electronic state. By comparison with theoretical calculations we show that at least the extra large $\Gamma$-pocket seen by ARPES is generated by the surface atomic layer of the crystal. Detailed Fermi surface topology and other related topics will also be discussed.

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Authors

  • Chang Liu

    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University

  • Yongbin Lee

    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University

  • Ari D. Palczewski

    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA

  • Jiaqiang Yan

    • Ames Laboratory
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory, Iowa State University

  • Takeshi Kondo

    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory and Dept. of Physics and Astronomy, Iowa State University

  • Bruce Harmon

    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University

  • Adam Kaminski

    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University

  • Tom Lograsso

    • Materials and Engineering Physics Program, Ames Laboratory