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 language | English |
|---|---|
| Article number | 20351 |
| Journal | Scientific Reports |
| Volume | 8 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Dec 1 2018 |
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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 journal › Article
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TY - JOUR
T1 - Metallic phase in stoichiometric CeOBiS 2 revealed by space-resolved ARPES
AU - Sugimoto, T.
AU - Paris, E.
AU - Wakita, Takanori
AU - Terashima, Kensei
AU - Yokoya, Takayoshi
AU - Barinov, A.
AU - Kajitani, J.
AU - Higashinaka, R.
AU - Matsuda, T. D.
AU - Aoki, Y.
AU - Mizokawa, T.
AU - Saini, N. L.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85041642813&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85041642813&partnerID=8YFLogxK
U2 - 10.1038/s41598-018-20351-y
DO - 10.1038/s41598-018-20351-y
M3 - Article
VL - 8
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 20351
ER -