Superconductivity in a New Layered BiSe2-Based Compound LaO1-xBiSe2

We report in this contribution a new superconductor LaO 1- x BiSe 2 which was synthesized by solid-state reaction method. The structure analysis indicated that LaO 1- x BiSe 2 compound has typical CeOBiS 2 -type structure with P 4/ nmm space group. Compared with the parent phase LaOBiSe 2 , the latt...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2020-07, Vol.33 (7), p.1949-1954
Main Authors: Liu, Shiheng, Chen, Yongliang, Cui, Yajing, Wen, Zhiwei, Liu, Yue, Cheng, Cuihua, Zhao, Yong
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
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Summary:We report in this contribution a new superconductor LaO 1- x BiSe 2 which was synthesized by solid-state reaction method. The structure analysis indicated that LaO 1- x BiSe 2 compound has typical CeOBiS 2 -type structure with P 4/ nmm space group. Compared with the parent phase LaOBiSe 2 , the lattice parameters of LaO 0.9 BiSe 2 contracted. Physical property characterizations demonstrated that the charge density wave behavior of the parent phase was suppressed by oxygen vacancies and a superconducting transition at 2.9 K was observed in LaO 0.9 BiSe 2 sample. The present work shows that the introduction of oxygen vacancies without extrinsic doping is an effective approach to induce superconductivity in the LaOBiSe 2 system.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-020-05468-4