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Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi

Author

Listed:
  • Erjian Cheng

    (Leibniz Institute for Solid State and Materials Research (IFW-Dresden)
    Max Planck Institute for Chemical Physics of Solids)

  • Limin Yan

    (Center for High Pressure Science and Technology Advanced Research
    Jilin University)

  • Xianbiao Shi

    (Harbin Institute of Technology
    Harbin Institute of Technology (Shenzhen))

  • Rui Lou

    (Leibniz Institute for Solid State and Materials Research (IFW-Dresden)
    Helmholtz-Zentrum Berlin für Materialien und Energie
    Joint Laboratory “Functional Quantum Materials” at BESSY II)

  • Alexander Fedorov

    (Leibniz Institute for Solid State and Materials Research (IFW-Dresden)
    Helmholtz-Zentrum Berlin für Materialien und Energie
    Joint Laboratory “Functional Quantum Materials” at BESSY II)

  • Mahdi Behnami

    (Leibniz Institute for Solid State and Materials Research (IFW-Dresden))

  • Jian Yuan

    (ShanghaiTech University)

  • Pengtao Yang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Bosen Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Jin-Guang Cheng

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yuanji Xu

    (University of Science and Technology Beijing)

  • Yang Xu

    (East China Normal University)

  • Wei Xia

    (ShanghaiTech University)

  • Nikolai Pavlovskii

    (Technische Universität Dresden)

  • Darren C. Peets

    (Technische Universität Dresden)

  • Weiwei Zhao

    (Harbin Institute of Technology
    Harbin Institute of Technology (Shenzhen))

  • Yimin Wan

    (Fudan University)

  • Ulrich Burkhardt

    (Max Planck Institute for Chemical Physics of Solids)

  • Yanfeng Guo

    (ShanghaiTech University)

  • Shiyan Li

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures
    Shanghai Research Center for Quantum Sciences)

  • Claudia Felser

    (Max Planck Institute for Chemical Physics of Solids)

  • Wenge Yang

    (Center for High Pressure Science and Technology Advanced Research)

  • Bernd Büchner

    (Leibniz Institute for Solid State and Materials Research (IFW-Dresden)
    Technische Universität Dresden)

Abstract

The noncentrosymmetric ferromagnetic Weyl semimetal CeAlSi with simultaneous space-inversion and time-reversal symmetry breaking provides a unique platform for exploring novel topological states. Here, by employing multiple experimental techniques, we demonstrate that ferromagnetism and pressure can serve as efficient parameters to tune the positions of Weyl nodes in CeAlSi. At ambient pressure, a magnetism-facilitated anomalous Hall/Nernst effect (AHE/ANE) is uncovered. Angle-resolved photoemission spectroscopy (ARPES) measurements demonstrated that the Weyl nodes with opposite chirality are moving away from each other upon entering the ferromagnetic phase. Under pressure, by tracing the pressure evolution of AHE and band structure, we demonstrate that pressure could also serve as a pivotal knob to tune the positions of Weyl nodes. Moreover, multiple pressure-induced phase transitions are also revealed. These findings indicate that CeAlSi provides a unique and tunable platform for exploring exotic topological physics and electron correlations, as well as catering to potential applications, such as spintronics.

Suggested Citation

  • Erjian Cheng & Limin Yan & Xianbiao Shi & Rui Lou & Alexander Fedorov & Mahdi Behnami & Jian Yuan & Pengtao Yang & Bosen Wang & Jin-Guang Cheng & Yuanji Xu & Yang Xu & Wei Xia & Nikolai Pavlovskii & D, 2024. "Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45658-5
    DOI: 10.1038/s41467-024-45658-5
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    References listed on IDEAS

    as
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