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<p>We investigate the electron band structure of grey arsenic, whose (111) face hosts the topological Shockley state. Interestingly, the bulk band close to the touching point with the surface state exhibits the characteristics of inelastic scattering. Moreover, the band structure analysis reveals linearity in the imaginary part of electron self-energy. These features are analogous to those observed in high-temperature superconductors and marginal Fermi liquid systems, respectively, where strong electronic correlations exist. Our results suggest that correlated many-body states can be connected by non-interacting topological states, providing a viable playground to explore the coupling between topological and correlated states via grey arsenic surface.</p>

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Evidence for strong electronic correlations in the bulk state of grey arsenic

  • 期刊论文

  • 发表日期：

    2026年2月28日

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  • Minhee Kang,
  • Hayoon Im,
  • Ji-Eun Lee,
  • Sung-Kwan Mo,
  • Jonathan Denlinger,
  • Kyoo Kim,
  • Pavel Dudin,
  • Jose Ávila,
  • Haeyong Kang,
  • Jaekwang Lee,
  • Jong Mok Ok,
  • Xuetao Zhu,
  • Jiandong Guo,
  • Choongyu Hwang

摘要

We investigate the electron band structure of grey arsenic, whose (111) face hosts the topological Shockley state. Interestingly, the bulk band close to the touching point with the surface state exhibits the characteristics of inelastic scattering. Moreover, the band structure analysis reveals linearity in the imaginary part of electron self-energy. These features are analogous to those observed in high-temperature superconductors and marginal Fermi liquid systems, respectively, where strong electronic correlations exist. Our results suggest that correlated many-body states can be connected by non-interacting topological states, providing a viable playground to explore the coupling between topological and correlated states via grey arsenic surface.