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

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Abstract

We report in this contribution a new superconductor LaO1-xBiSe2 which was synthesized by solid-state reaction method. The structure analysis indicated that LaO1-xBiSe2 compound has typical CeOBiS2-type structure with P4/nmm space group. Compared with the parent phase LaOBiSe2, the lattice parameters of LaO0.9BiSe2 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 LaO0.9BiSe2 sample. The present work shows that the introduction of oxygen vacancies without extrinsic do** is an effective approach to induce superconductivity in the LaOBiSe2 system.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 11104224, 11004162) and the Research Fund for the Doctoral Program of Higher Education of China (20110184120029). Yongliang Chen gratefully acknowledges support by the Foundation of Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Ministry of Education.

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Authors and Affiliations

  1. Superconductivity and New Energy R&D Center, and Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China

    Shiheng Liu, Yongliang Chen, Ya**g Cui, Zhiwei Wen, Yue Liu, Cuihua Cheng & Yong Zhao

  2. School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, China

    Shiheng Liu, Ya**g Cui, Zhiwei Wen & Yue Liu

  3. College of Physics and Energy, Fujian Normal University, Fuzhou, 350117, Fujian, China

    Yong Zhao

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  1. Shiheng Liu
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  2. Yongliang Chen
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  3. Ya**g Cui
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  4. Zhiwei Wen
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  5. Yue Liu
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Correspondence to Yongliang Chen or Yong Zhao.

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Liu, S., Chen, Y., Cui, Y. et al. Superconductivity in a New Layered BiSe2-Based Compound LaO1-xBiSe2. J Supercond Nov Magn 33, 1949–1954 (2020). https://doi.org/10.1007/s10948-020-05468-4

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  • DOI: https://doi.org/10.1007/s10948-020-05468-4

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