Fermi surfaces and orbital polarization in superconducting CeO0.5 F0.5BiS2 revealed by angle-resolved photoemission spectroscopy

T. Sugimoto, D. Ootsuki, C. Morice, E. Artacho, S. S. Saxena, E. F. Schwier, M. Zheng, Y. Kojima, H. Iwasawa, K. Shimada, M. Arita, H. Namatame, M. Taniguchi, M. Takahashi, N. L. Saini, T. Asano, R. Higashinaka, T. D. Matsuda, Y. Aoki, Takashi Mizokawa

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    Abstract

    We have investigated the electronic structure of BiS2-based CeO0.5F0.5BiS2 superconductor using polarization-dependent angle-resolved photoemission spectroscopy (ARPES), and succeeded in elucidating the orbital characters on the Fermi surfaces. In the rectangular Fermi pockets around the X point, the straight portion parallel to the ky direction is dominated by Bi 6px character. The orbital polarization indicates the underlying quasi-one-dimensional electronic structure of the BiS2 system. Moreover, distortions on tetragonally aligned Bi could give rise to the band Jahn-Teller effect.

    Original languageEnglish
    Article number041113
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume92
    Issue number4
    DOIs
    Publication statusPublished - 2015 Jul 16

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    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Sugimoto, T., Ootsuki, D., Morice, C., Artacho, E., Saxena, S. S., Schwier, E. F., Zheng, M., Kojima, Y., Iwasawa, H., Shimada, K., Arita, M., Namatame, H., Taniguchi, M., Takahashi, M., Saini, N. L., Asano, T., Higashinaka, R., Matsuda, T. D., Aoki, Y., & Mizokawa, T. (2015). Fermi surfaces and orbital polarization in superconducting CeO0.5 F0.5BiS2 revealed by angle-resolved photoemission spectroscopy. Physical Review B - Condensed Matter and Materials Physics, 92(4), [041113]. https://doi.org/10.1103/PhysRevB.92.041113