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Observation of symmetry-forbidden rectification in an inversion-symmetric Weyl metal

Author

Listed:
  • Yusuff Adeyemi Salawu

    (Daegu University)

  • Yoonseok Choun

    (Pohang University of Science and Technology (POSTECH))

  • Seung-Jong Yoo

    (Pohang University of Science and Technology (POSTECH))

  • Minoru Sasaki

    (Yamagata University, Kojirakawa)

  • Ki-Seok Kim

    (Pohang University of Science and Technology (POSTECH))

  • Heon-Jung Kim

    (Daegu University
    Daegu University)

Abstract

Conventional metals cannot undergo rectification at low-field regions because the existence of Fermi energy prohibits nonlinear responses. Similarly, materials with inversion symmetry typically do not exhibit rectification as it necessitates the inversion symmetry breaking in the conventional mechanism. In this study, we report our observation of symmetry-forbidden rectification in metals, realized as a non-equilibrium steady state in an inversion-symmetric Weyl metallic phase of Bi1-xSbx (x = 3–4%). Constructing a van der Pol nonlinear differential equation derived from axion electrodynamics, we find an analytic steady-state solution that exhibits a symmetry-breaking bifurcation responsible for the rectification. Our experimental and theoretical results show the symmetry-forbidden nonlinear response as the manifestation of the spontaneous dynamical inversion-symmetry breaking in Weyl metals before reaching chaos.

Suggested Citation

  • Yusuff Adeyemi Salawu & Yoonseok Choun & Seung-Jong Yoo & Minoru Sasaki & Ki-Seok Kim & Heon-Jung Kim, 2025. "Observation of symmetry-forbidden rectification in an inversion-symmetric Weyl metal," Nature Communications, Nature, vol. 16(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59394-x
    DOI: 10.1038/s41467-025-59394-x
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    References listed on IDEAS

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    1. Yan Li & Yang Li & Peng Li & Bin Fang & Xu Yang & Yan Wen & Dong-xing Zheng & Chen-hui Zhang & Xin He & Aurélien Manchon & Zhao-Hua Cheng & Xi-xiang Zhang, 2021. "Nonreciprocal charge transport up to room temperature in bulk Rashba semiconductor α-GeTe," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    2. C. P. Schmid & L. Weigl & P. Grössing & V. Junk & C. Gorini & S. Schlauderer & S. Ito & M. Meierhofer & N. Hofmann & D. Afanasiev & J. Crewse & K. A. Kokh & O. E. Tereshchenko & J. Güdde & F. Evers & , 2021. "Tunable non-integer high-harmonic generation in a topological insulator," Nature, Nature, vol. 593(7859), pages 385-390, May.
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