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Nematic superconducting state in iron pnictide superconductors

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  • Jun Li

    (Research Institute of Superconductor Electronics, Nanjing University
    National Institute for Materials Science
    INPAC-Institute for Nanoscale Physics and Chemistry, KU Leuven)

  • Paulo J. Pereira

    (INPAC-Institute for Nanoscale Physics and Chemistry, KU Leuven
    Theory of Nanomaterials Group, KU Leuven)

  • Jie Yuan

    (Research Institute of Superconductor Electronics, Nanjing University
    National Institute for Materials Science
    National Laboratory for Superconductivity, Institute of Physics, and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences)

  • Yang-Yang Lv

    (Research Institute of Superconductor Electronics, Nanjing University)

  • Mei-Ping Jiang

    (Research Institute of Superconductor Electronics, Nanjing University)

  • Dachuan Lu

    (Research Institute of Superconductor Electronics, Nanjing University)

  • Zi-Quan Lin

    (Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology)

  • Yong-Jie Liu

    (Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology)

  • Jun-Feng Wang

    (Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology)

  • Liang Li

    (Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology)

  • Xiaoxing Ke

    (Electron Microscopy for Materials Research (EMAT), University of Antwerp)

  • Gustaaf Van Tendeloo

    (Electron Microscopy for Materials Research (EMAT), University of Antwerp)

  • Meng-Yue Li

    (Research Institute of Superconductor Electronics, Nanjing University
    National Institute for Materials Science)

  • Hai-Luke Feng

    (National Institute for Materials Science)

  • Takeshi Hatano

    (National Institute for Materials Science)

  • Hua-Bing Wang

    (Research Institute of Superconductor Electronics, Nanjing University
    National Institute for Materials Science)

  • Pei-Heng Wu

    (Research Institute of Superconductor Electronics, Nanjing University
    Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China)

  • Kazunari Yamaura

    (National Institute for Materials Science
    Graduate School of Chemical Sciences and Engineering, Hokkaido University)

  • Eiji Takayama-Muromachi

    (National Institute for Materials Science
    Graduate School of Chemical Sciences and Engineering, Hokkaido University)

  • Johan Vanacken

    (INPAC-Institute for Nanoscale Physics and Chemistry, KU Leuven)

  • Liviu F. Chibotaru

    (Theory of Nanomaterials Group, KU Leuven)

  • Victor V. Moshchalkov

    (INPAC-Institute for Nanoscale Physics and Chemistry, KU Leuven)

Abstract

Nematic order often breaks the tetragonal symmetry of iron-based superconductors. It arises from regular structural transition or electronic instability in the normal phase. Here, we report the observation of a nematic superconducting state, by measuring the angular dependence of the in-plane and out-of-plane magnetoresistivity of Ba0.5K0.5Fe2As2 single crystals. We find large twofold oscillations in the vicinity of the superconducting transition, when the direction of applied magnetic field is rotated within the basal plane. To avoid the influences from sample geometry or current flow direction, the sample was designed as Corbino-shape for in-plane and mesa-shape for out-of-plane measurements. Theoretical analysis shows that the nematic superconductivity arises from the weak mixture of the quasi-degenerate s-wave and d-wave components of the superconducting condensate, most probably induced by a weak anisotropy of stresses inherent to single crystals.

Suggested Citation

  • Jun Li & Paulo J. Pereira & Jie Yuan & Yang-Yang Lv & Mei-Ping Jiang & Dachuan Lu & Zi-Quan Lin & Yong-Jie Liu & Jun-Feng Wang & Liang Li & Xiaoxing Ke & Gustaaf Van Tendeloo & Meng-Yue Li & Hai-Luke , 2017. "Nematic superconducting state in iron pnictide superconductors," Nature Communications, Nature, vol. 8(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-02016-y
    DOI: 10.1038/s41467-017-02016-y
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    Cited by:

    1. I. Silber & S. Mathimalar & I. Mangel & A. K. Nayak & O. Green & N. Avraham & H. Beidenkopf & I. Feldman & A. Kanigel & A. Klein & M. Goldstein & A. Banerjee & E. Sela & Y. Dagan, 2024. "Two-component nematic superconductivity in 4Hb-TaS2," Nature Communications, Nature, vol. 15(1), pages 1-6, December.
    2. Xinjian Wei & Congkuan Tian & Hang Cui & Yuxin Zhai & Yongkai Li & Shaobo Liu & Yuanjun Song & Ya Feng & Miaoling Huang & Zhiwei Wang & Yi Liu & Qihua Xiong & Yugui Yao & X. C. Xie & Jian-Hao Chen, 2024. "Three-dimensional hidden phase probed by in-plane magnetotransport in kagome metal CsV3Sb5 thin flakes," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    3. Guanqun Zhang & Lijie Wang & Jinghui Wang & Guoan Li & Guangyi Huang & Guang Yang & Huanyi Xue & Zhongfeng Ning & Yueshen Wu & Jin-Peng Xu & Yanru Song & Zhenghua An & Changlin Zheng & Jie Shen & Jun , 2023. "Spontaneous rotational symmetry breaking in KTaO3 heterointerface superconductors," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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