Polarization-Dependent Three-Dimensional Angle-Resolved Photoemission Spectroscopy of BaFe_1.8Co_0.2As₂

2013/11/20 by Tetsuya Hajiri, Hajiri, Tetsuya, Takahiro Ito +9
Business, Management and Accounting · Materials Science · #FOS: Physical sciences #Intellectual Capital and Performance Analysis #Iron-based superconductors research #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.1311.4990

openalex publication_date 2013/11/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We performed polarization- and photon-energy-dependent angle-resolved photoemission spectroscopy of a slightly overdoped iron pnictide superconductor, BaFe_1.8Co_0.2As₂, to clarify the three-dimensional electronic structure including its orbital characters at the Brillouin zone center. Two hole Fermi surfaces (FSs) with d_xz/yz and d_xy/x²-y² orbitals were observed but d_z² hole FS, which has nodes according to a theory of the spin-fluctuation superconductivity mechanism, did not appear. These results suggest that no node will appear at hole FSs at the zone center.

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