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Topological layer Hall effect in two-dimensional type-I multiferroic heterostructure.

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We introduce the topological layer Hall effect, a novel phenomenon coupling magnetic skyrmions and layer physics in 2D multiferroics. This effect, driven by real-space Berry physics, offers new avenues for spintronic devices.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Spintronics

Background:

  • Magnetic skyrmions and layer physics are crucial for fundamental research and device applications.
  • Existing layer Hall effects rely on momentum-space Berry phases, requiring fine-tuned electronic bands.

Purpose of the Study:

  • To propose and demonstrate a mechanism for coupling magnetic skyrmion and layer physics in 2D type-I multiferroic heterostructures.
  • To introduce the concept of the topological layer Hall effect, distinct from conventional layer Hall effects.
  • To explore the controllability of this effect via magnetoelectric coupling.

Main Methods:

  • Symmetry and model analysis to propose the coupling mechanism.
  • First-principles calculations.
  • Atomic spin model simulations.

Main Results:

  • A novel mechanism for topological layer Hall effect driven by layer-polarized real-space Berry physics from magnetic skyrmions.
  • Demonstration of the effect in a 2D multiferroic heterostructure (CrInSe3/In2S3/CrInSe3).
  • Evidence that magnetoelectric coupling allows for effective control of the topological layer Hall effect.

Conclusions:

  • The topological layer Hall effect provides a new paradigm for understanding electron behavior in layered magnetic materials.
  • This discovery enriches research in magnetic skyrmions and the layer Hall effect.
  • The proposed mechanism and demonstrated material system offer potential for novel spintronic devices.