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Prominent Josephson tunneling between twisted single copper oxide planes of Bi2Sr2-xLaxCuO6+y

Author

Listed:
  • Heng Wang

    (Tsinghua University)

  • Yuying Zhu

    (Beijing Academy of Quantum Information Sciences
    Hefei National Laboratory)

  • Zhonghua Bai

    (Tsinghua University)

  • Zechao Wang

    (Tsinghua University
    Ji Hua Laboratory)

  • Shuxu Hu

    (Tsinghua University)

  • Hong-Yi Xie

    (Beijing Academy of Quantum Information Sciences)

  • Xiaopeng Hu

    (Tsinghua University)

  • Jian Cui

    (Beijing Academy of Quantum Information Sciences)

  • Miaoling Huang

    (Beijing Academy of Quantum Information Sciences)

  • Jianhao Chen

    (Beijing Academy of Quantum Information Sciences
    Peking University)

  • Ying Ding

    (Chinese Academy of Sciences)

  • Lin Zhao

    (Chinese Academy of Sciences)

  • Xinyan Li

    (Chinese Academy of Sciences)

  • Qinghua Zhang

    (Chinese Academy of Sciences)

  • Lin Gu

    (Tsinghua University
    Chinese Academy of Sciences)

  • X. J. Zhou

    (Chinese Academy of Sciences)

  • Jing Zhu

    (Tsinghua University
    Ji Hua Laboratory)

  • Ding Zhang

    (Tsinghua University
    Beijing Academy of Quantum Information Sciences
    RIKEN Center for Emergent Matter Science (CEMS))

  • Qi-Kun Xue

    (Tsinghua University
    Beijing Academy of Quantum Information Sciences
    Southern University of Science and Technology)

Abstract

Josephson tunneling in twisted cuprate junctions provides a litmus test for the pairing symmetry, which is fundamental for understanding the microscopic mechanism of high temperature superconductivity. This issue is rekindled by experimental advances in van der Waals stacking and the proposal of an emergent d+id-wave. So far, all experiments have been carried out on Bi2Sr2CaCu2O8+x (Bi-2212) with double CuO2 planes but show controversial results. Here, we investigate junctions made of Bi2Sr2-xLaxCuO6+y (Bi-2201) with single CuO2 planes. Our on-site cold stacking technique ensures uncompromised crystalline quality and stoichiometry at the interface. Junctions with carefully calibrated twist angles around 45° show strong Josephson tunneling and conventional temperature dependence. Furthermore, we observe standard Fraunhofer diffraction patterns and integer Fiske steps in a junction with a twist angle of 45.0±0.2°. Together, these results pose strong constraints on the d or d+id-wave pairing and suggest an indispensable isotropic pairing component.

Suggested Citation

  • Heng Wang & Yuying Zhu & Zhonghua Bai & Zechao Wang & Shuxu Hu & Hong-Yi Xie & Xiaopeng Hu & Jian Cui & Miaoling Huang & Jianhao Chen & Ying Ding & Lin Zhao & Xinyan Li & Qinghua Zhang & Lin Gu & X. J, 2023. "Prominent Josephson tunneling between twisted single copper oxide planes of Bi2Sr2-xLaxCuO6+y," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40525-1
    DOI: 10.1038/s41467-023-40525-1
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    References listed on IDEAS

    as
    1. Fang Wang & Johan Biscaras & Andreas Erb & Abhay Shukla, 2021. "Superconductor-insulator transition in space charge doped one unit cell Bi2.1Sr1.9CaCu2O8+x," Nature Communications, Nature, vol. 12(1), pages 1-6, December.
    2. Yuan Huang & Yu-Hao Pan & Rong Yang & Li-Hong Bao & Lei Meng & Hai-Lan Luo & Yong-Qing Cai & Guo-Dong Liu & Wen-Juan Zhao & Zhang Zhou & Liang-Mei Wu & Zhi-Li Zhu & Ming Huang & Li-Wei Liu & Lei Liu &, 2020. "Universal mechanical exfoliation of large-area 2D crystals," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    3. Da Jiang & Tao Hu & Lixing You & Qiao Li & Ang Li & Haomin Wang & Gang Mu & Zhiying Chen & Haoran Zhang & Guanghui Yu & Jie Zhu & Qiujuan Sun & Chengtian Lin & Hong Xiao & Xiaoming Xie & Mianheng Jian, 2014. "High-Tc superconductivity in ultrathin Bi2Sr2CaCu2O8+x down to half-unit-cell thickness by protection with graphene," Nature Communications, Nature, vol. 5(1), pages 1-6, December.
    4. Menghan Liao & Yuying Zhu & Shuxu Hu & Ruidan Zhong & John Schneeloch & Genda Gu & Ding Zhang & Qi-Kun Xue, 2022. "Little-Parks like oscillations in lightly doped cuprate superconductors," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
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