Electronic structure of (Ca0.85La0.15)FeAs2

We report a comprehensive study of orbital character and tridimensional nature of the electronic structure of (Ca0.85La0.15)FeAs2 from recently discovered “112” family of Iron-based superconductors (IBS), with angle-resolved photoemission spectroscopy. We observed that the band structure is similar...

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Published in:Applied physics letters 2015-02, Vol.106 (5)
Main Authors: Liu, Z.-H., Kim, T. K., Sala, A., Ogino, H., Shimoyama, J., Büchner, B., Borisenko, S. V.
Format: Article
Language:English
Subjects:
Applied physics
Banded structure
Brillouin zones
Crystal structure
Electronic structure
Electrons
Iron
Photoelectric emission
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container_title Applied physics letters
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Sala, A.
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description We report a comprehensive study of orbital character and tridimensional nature of the electronic structure of (Ca0.85La0.15)FeAs2 from recently discovered “112” family of Iron-based superconductors (IBS), with angle-resolved photoemission spectroscopy. We observed that the band structure is similar to that of “122” family, namely, there are three hole-like bands at the Brillouin zone (BZ) center and two electron-like bands at the BZ corner. The bands near the Fermi level (EF) are mainly derived from the Fe t2g orbitals. On the basis of our present and earlier studies, we classify IBS into the three types according to their crystal structures. We show that although the bands near EF mainly originate from Fe 3d electrons, they are significantly modified by the interaction between the superconducting slabs and the intermediate atoms.
doi_str_mv 10.1063/1.4907876
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subjects Applied physics
Banded structure
Brillouin zones
Crystal structure
Electronic structure
Electrons
Iron
Photoelectric emission
title Electronic structure of (Ca0.85La0.15)FeAs2
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