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<p>Superconductivity is typically considered incompatible with ferromagnetism. Great efforts have been devoted to achieving the simultaneous coexistence of these two competing phenomena in a single system. However, previous attempts to integrate ferromagnetism and superconductivity have primarily focused on creating artificial heterostructures, separating them into distinct vertical layers. Simple and efficient strategies for realizing the in-plane coexistence of ferromagnetism and superconductivity remain a great challenge. Here, we report an interlayer-confined decoration strategy to embed ferromagnetic order into superconducting TaS<sub>2</sub> lattice by decorating isolated Fe atoms, while preserving the intralayer lattice of TaS<sub>2</sub>. In Fe-decorated TaS<sub>2</sub>, Fe atoms in the single-atom form exhibit two distinct configurations, namely, substituting Ta atoms and being anchored at the interstitial sites. Both configurations result in the generation of local magnetic moments via the hybridization of Fe-3d, Ta-5d, and S-2p electronic states. Notably, this strategy can be extended to other metal atoms such as magnetic Co, Ni and Mn, as well as non-magnetic Pt and Cu, serving as a general approach for chemically manipulating the electronic properties of two-dimensional (2D) materials and offering new possibilities in artificial design and synthesis of novel quantum materials.</p>

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Coexistence of ferromagnetism and superconductivity in TaS2 lattice by confined atomic iron decoration

  • 期刊论文

  • 发表日期：

    2025年4月28日

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  • Yang Liu,
  • Guoliang Hu,
  • Minghao Wang,
  • Yuqiao Guo,
  • Xiaolin Tai,
  • Haofeng Sun,
  • Yue Lin,
  • Yi Xie,
  • Changzheng Wu

摘要

Superconductivity is typically considered incompatible with ferromagnetism. Great efforts have been devoted to achieving the simultaneous coexistence of these two competing phenomena in a single system. However, previous attempts to integrate ferromagnetism and superconductivity have primarily focused on creating artificial heterostructures, separating them into distinct vertical layers. Simple and efficient strategies for realizing the in-plane coexistence of ferromagnetism and superconductivity remain a great challenge. Here, we report an interlayer-confined decoration strategy to embed ferromagnetic order into superconducting TaS2 lattice by decorating isolated Fe atoms, while preserving the intralayer lattice of TaS2. In Fe-decorated TaS2, Fe atoms in the single-atom form exhibit two distinct configurations, namely, substituting Ta atoms and being anchored at the interstitial sites. Both configurations result in the generation of local magnetic moments via the hybridization of Fe-3d, Ta-5d, and S-2p electronic states. Notably, this strategy can be extended to other metal atoms such as magnetic Co, Ni and Mn, as well as non-magnetic Pt and Cu, serving as a general approach for chemically manipulating the electronic properties of two-dimensional (2D) materials and offering new possibilities in artificial design and synthesis of novel quantum materials.