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
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Sugimoto, T., Ootsuki, D., Morice, C., Artacho, E., Saxena, S., Schwier, E., Zheng, M., et al. (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)https://doi.org/10.1103/PhysRevB.92.041113
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.
External DOI: https://doi.org/10.1103/PhysRevB.92.041113
This record's URL: https://www.repository.cam.ac.uk/handle/1810/266201