Ce 4f electronic states of CeO1−xFxBiS2 … | Zendy

Takanori Wakita | Zendy; Kensei Terashima | Zendy; Takahiro Hamada | Zendy; Hirokazu Fujiwara | Zendy; Makoto Minohara | Zendy; Masaki Kobayashi | Zendy; Koji Horiba | Zendy; Hiroshi Kumigashira | Zendy; G. Kutluk | Zendy; Masanori Nagao | Zendy; Satoshi Watauchi | Zendy; Isao Tanaka | Zendy; Satoshi Demura | Zendy; Hiroyuki Okazaki | Zendy; Yoshihiko Takano | Zendy; Yoshikazu Mizuguchi | Zendy; Osuke Miura | Zendy; Kozo Okada | Zendy; Yuji Muraoka | Zendy; T. Yokoya | Zendy

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Ce 4f electronic states of CeO1−xFxBiS2 …

Author(s) -

Takanori Wakita,

Kensei Terashima,

Takahiro Hamada,

Hirokazu Fujiwara,

Makoto Minohara,

Masaki Kobayashi,

Koji Horiba,

Hiroshi Kumigashira,

G. Kutluk,

Masanori Nagao,

Satoshi Watauchi,

Isao Tanaka,

Satoshi Demura,

Hiroyuki Okazaki,

Yoshihiko Takano,

Yoshikazu Mizuguchi,

Osuke Miura,

Kozo Okada,

Yuji Muraoka,

T. Yokoya

Publication year - 2017

Publication title -

physical review. b./physical review. b

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.78

H-Index - 465

eISSN - 2469-9969

pISSN - 2469-9950

DOI - 10.1103/physrevb.95.085109

Subject(s) - valence (chemistry) , physics , spectral line , materials science , superconductivity , crystal (programming language) , crystallite , condensed matter physics , crystallography , energy (signal processing) , atomic physics , chemistry , quantum mechanics , computer science , programming language

We use soft x-ray photoemission spectroscopy (SXPES) to investigate Ce 4f electronic states of a new BiS2 layered superconductor CeO1-xFxBiS2, for polycrystalline and single-crystal samples. The Ce 3d spectrum of the single crystal of nominal composition x = 0.7 has no f(0) component and the spectral shape closely resembles the ones observed for Ce trivalent insulating compounds, strongly implying that the CeO layer is still in an insulating state even after the F doping. The Ce 3d-4f resonant SXPES for both polycrystalline and single-crystal samples shows that the prominent peak is located around 1 eV below the Fermi level (E-F) with negligible spectral intensity at EF. The F-concentration dependence of the valence band spectra for single crystals shows the increases of the degeneracy in energy levels and of the interaction between Ce 4f and S 3p states. These results give insight into the nature of the CeO1-xFx layer and the microscopic coexistence of magnetism and superconductivity in CeO1-xFxBiS2

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