Role of the Ce valence in the coexistence of superconductivity and ferromagnetism of CeO1x FxBiS2 revealed by Ce L3 -edge x-ray absorption spectroscopy

T. Sugimoto, B. Joseph, E. Paris, A. Iadecola, Takashi Mizokawa, S. Demura, Y. Mizuguchi, Y. Takano, N. L. Saini

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

We have performed Ce L3-edge x-ray absorption spectroscopy (XAS) measurements on CeO1 xFxBiS2, in which the superconductivity of the BiS2 layer and the ferromagnetism of the CeO1 xFx layer are induced by the F doping, in order to investigate the impact of the F doping on the local electronic and lattice structures. The Ce L3-edge XAS spectrum of CeOBiS2 exhibits coexistence of 4f1 (Ce3+) and 4f0 (Ce4+) state transitions revealing Ce mixed valency in this system. The spectral weight of the 4f0 state decreases with the F doping and completely disappears for x>0.4 where the system shows the superconductivity and the ferromagnetism. The results suggest that suppression of the Ce-S-Bi coupling channel by the F doping appears to drive the system from the valence fluctuation regime to the Kondo-like regime, leading to the coexistence of the superconducting BiS2 layer and the ferromagnetic CeO1 xFx layer.

Original languageEnglish
Article number201117
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number20
DOIs
Publication statusPublished - 2014 May 30
Externally publishedYes

Fingerprint

Ferromagnetism
Superconductivity
Absorption spectroscopy
x ray absorption
x ray spectroscopy
ferromagnetism
absorption spectroscopy
superconductivity
Doping (additives)
valence
X rays
retarding
electronic structure

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Role of the Ce valence in the coexistence of superconductivity and ferromagnetism of CeO1x FxBiS2 revealed by Ce L3 -edge x-ray absorption spectroscopy. / Sugimoto, T.; Joseph, B.; Paris, E.; Iadecola, A.; Mizokawa, Takashi; Demura, S.; Mizuguchi, Y.; Takano, Y.; Saini, N. L.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 89, No. 20, 201117, 30.05.2014.

Research output: Contribution to journalArticle

@article{be48c2253fa44a2497777564480dfaca,
title = "Role of the Ce valence in the coexistence of superconductivity and ferromagnetism of CeO1x FxBiS2 revealed by Ce L3 -edge x-ray absorption spectroscopy",
abstract = "We have performed Ce L3-edge x-ray absorption spectroscopy (XAS) measurements on CeO1 xFxBiS2, in which the superconductivity of the BiS2 layer and the ferromagnetism of the CeO1 xFx layer are induced by the F doping, in order to investigate the impact of the F doping on the local electronic and lattice structures. The Ce L3-edge XAS spectrum of CeOBiS2 exhibits coexistence of 4f1 (Ce3+) and 4f0 (Ce4+) state transitions revealing Ce mixed valency in this system. The spectral weight of the 4f0 state decreases with the F doping and completely disappears for x>0.4 where the system shows the superconductivity and the ferromagnetism. The results suggest that suppression of the Ce-S-Bi coupling channel by the F doping appears to drive the system from the valence fluctuation regime to the Kondo-like regime, leading to the coexistence of the superconducting BiS2 layer and the ferromagnetic CeO1 xFx layer.",
author = "T. Sugimoto and B. Joseph and E. Paris and A. Iadecola and Takashi Mizokawa and S. Demura and Y. Mizuguchi and Y. Takano and Saini, {N. L.}",
year = "2014",
month = "5",
day = "30",
doi = "10.1103/PhysRevB.89.201117",
language = "English",
volume = "89",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "20",

}

TY - JOUR

T1 - Role of the Ce valence in the coexistence of superconductivity and ferromagnetism of CeO1x FxBiS2 revealed by Ce L3 -edge x-ray absorption spectroscopy

AU - Sugimoto, T.

AU - Joseph, B.

AU - Paris, E.

AU - Iadecola, A.

AU - Mizokawa, Takashi

AU - Demura, S.

AU - Mizuguchi, Y.

AU - Takano, Y.

AU - Saini, N. L.

PY - 2014/5/30

Y1 - 2014/5/30

N2 - We have performed Ce L3-edge x-ray absorption spectroscopy (XAS) measurements on CeO1 xFxBiS2, in which the superconductivity of the BiS2 layer and the ferromagnetism of the CeO1 xFx layer are induced by the F doping, in order to investigate the impact of the F doping on the local electronic and lattice structures. The Ce L3-edge XAS spectrum of CeOBiS2 exhibits coexistence of 4f1 (Ce3+) and 4f0 (Ce4+) state transitions revealing Ce mixed valency in this system. The spectral weight of the 4f0 state decreases with the F doping and completely disappears for x>0.4 where the system shows the superconductivity and the ferromagnetism. The results suggest that suppression of the Ce-S-Bi coupling channel by the F doping appears to drive the system from the valence fluctuation regime to the Kondo-like regime, leading to the coexistence of the superconducting BiS2 layer and the ferromagnetic CeO1 xFx layer.

AB - We have performed Ce L3-edge x-ray absorption spectroscopy (XAS) measurements on CeO1 xFxBiS2, in which the superconductivity of the BiS2 layer and the ferromagnetism of the CeO1 xFx layer are induced by the F doping, in order to investigate the impact of the F doping on the local electronic and lattice structures. The Ce L3-edge XAS spectrum of CeOBiS2 exhibits coexistence of 4f1 (Ce3+) and 4f0 (Ce4+) state transitions revealing Ce mixed valency in this system. The spectral weight of the 4f0 state decreases with the F doping and completely disappears for x>0.4 where the system shows the superconductivity and the ferromagnetism. The results suggest that suppression of the Ce-S-Bi coupling channel by the F doping appears to drive the system from the valence fluctuation regime to the Kondo-like regime, leading to the coexistence of the superconducting BiS2 layer and the ferromagnetic CeO1 xFx layer.

UR - http://www.scopus.com/inward/record.url?scp=84902143402&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84902143402&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.89.201117

DO - 10.1103/PhysRevB.89.201117

M3 - Article

VL - 89

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 20

M1 - 201117

ER -