Metallic phase in stoichiometric CeOBiS 2 revealed by space-resolved ARPES

T. Sugimoto, E. Paris, Takanori Wakita, Kensei Terashima, Takayoshi Yokoya, A. Barinov, J. Kajitani, R. Higashinaka, T. D. Matsuda, Y. Aoki, T. Mizokawa, N. L. Saini

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Abstract

Recently CeOBiS 2 system without any fluorine doping is found to show superconductivity posing question on its origin. Using space resolved ARPES we have found a metallic phase embedded in the morphological defects and at the sample edges of stoichiometric CeOBiS 2 . While bulk of the sample is semiconducting, the embedded metallic phase is characterized by the usual electron pocket at X point, similar to the Fermi surface of doped BiS 2 -based superconductors. Typical size of the observed metallic domain is larger than the superconducting correlation length of the system suggesting that the observed superconductivity in undoped CeOBiS 2 might be due to this embedded metallic phase at the defects. The results also suggest a possible way to develop new systems by manipulation of the defects in these chalcogenides with structural instability.

Original languageEnglish
Article number20351
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - Dec 1 2018

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defects
superconductivity
chalcogenides
Fermi surfaces
fluorine
manipulators
electrons

ASJC Scopus subject areas

  • General

Cite this

Metallic phase in stoichiometric CeOBiS 2 revealed by space-resolved ARPES. / Sugimoto, T.; Paris, E.; Wakita, Takanori; Terashima, Kensei; Yokoya, Takayoshi; Barinov, A.; Kajitani, J.; Higashinaka, R.; Matsuda, T. D.; Aoki, Y.; Mizokawa, T.; Saini, N. L.

In: Scientific Reports, Vol. 8, No. 1, 20351, 01.12.2018.

Research output: Contribution to journalArticle

Sugimoto, T, Paris, E, Wakita, T, Terashima, K, Yokoya, T, Barinov, A, Kajitani, J, Higashinaka, R, Matsuda, TD, Aoki, Y, Mizokawa, T & Saini, NL 2018, 'Metallic phase in stoichiometric CeOBiS 2 revealed by space-resolved ARPES', Scientific Reports, vol. 8, no. 1, 20351. https://doi.org/10.1038/s41598-018-20351-y
Sugimoto, T. ; Paris, E. ; Wakita, Takanori ; Terashima, Kensei ; Yokoya, Takayoshi ; Barinov, A. ; Kajitani, J. ; Higashinaka, R. ; Matsuda, T. D. ; Aoki, Y. ; Mizokawa, T. ; Saini, N. L. / Metallic phase in stoichiometric CeOBiS 2 revealed by space-resolved ARPES. In: Scientific Reports. 2018 ; Vol. 8, No. 1.
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