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<p>Magnet/superconductor hybrid systems have been put forward as a platform for realizing topological superconductivity. We investigated the heterostructure of ferromagnetic monolayer CrCl<sub>3</sub> and superconducting NbSe<sub>2</sub>. Using low-temperature scanning tunneling microscopy, we observe topologically trivial Yu-Shiba-Rusinov (YSR) states localized at the edge of CrCl<sub>3</sub> islands. DFT simulations reveal that the Cr atoms at the edge have an enhanced <i>d</i>-orbital DOS close to <i>E</i><sub><i>F</i></sub>. This leads to an exchange coupling between these atoms and the substrate that rationalizes the edge-localization of the YSR states.</p>

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One dimensional edge localized YSR states in CrCl3 on NbSe2

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月27日

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  • Jan P. Cuperus,
  • Arnold H. Kole,
  • Andrés R. Botello-Méndez,
  • Zeila Zanolli,
  • Daniel Vanmaekelbergh,
  • Ingmar Swart

摘要

Magnet/superconductor hybrid systems have been put forward as a platform for realizing topological superconductivity. We investigated the heterostructure of ferromagnetic monolayer CrCl3 and superconducting NbSe2. Using low-temperature scanning tunneling microscopy, we observe topologically trivial Yu-Shiba-Rusinov (YSR) states localized at the edge of CrCl3 islands. DFT simulations reveal that the Cr atoms at the edge have an enhanced d-orbital DOS close to EF. This leads to an exchange coupling between these atoms and the substrate that rationalizes the edge-localization of the YSR states.