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Graphene interfaces induce chiral spin textures, enabling skyrmions for advanced spintronics. This discovery utilizes the Rashba effect for Dzyaloshinskii-Moriya interaction, paving the way for 2D material-based spin-orbitronics.

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Area of Science:

  • Spintronics
  • Materials Science
  • Condensed Matter Physics

Background:

  • Graphene's spin-dependent properties are crucial for spintronics.
  • Chiral spin textures like skyrmions are sought for high-speed, low-energy devices.
  • Graphene typically exhibits weak spin-orbit coupling, not expected to induce significant magnetic chirality.

Purpose of the Study:

  • To demonstrate the induction of chiral spin textures at graphene/ferromagnetic metal interfaces.
  • To investigate the role of the Rashba effect in graphene-induced Dzyaloshinskii-Moriya interaction.
  • To explore the potential of two-dimensional materials in spin-orbitronics.

Main Methods:

  • First-principles calculations.
  • Experimental validation using spin-polarized electron microscopy.
  • Analysis of graphene-induced Dzyaloshinskii-Moriya interaction at interfaces.

Main Results:

  • Chiral spin textures are successfully induced at graphene/ferromagnetic metal interfaces.
  • Graphene induces a Dzyaloshinskii-Moriya interaction via the Rashba effect.
  • The induced interaction strength is comparable to that at heavy metal interfaces.

Conclusions:

  • Graphene interfaces can stabilize chiral spin textures.
  • The Rashba effect in graphene is a key mechanism for inducing magnetic chirality.
  • This research advances the development of two-dimensional-material-based spin-orbitronic devices.