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Spin pumping into two-dimensional systems.

Yuya Ominato1, Masaki Yama2, Ai Yamakage3

  • 1Waseda Institute for Advanced Study, Waseda University, Shinjuku-ku, Tokyo 169-0051, Japan.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|October 7, 2025
PubMed
Summary

This review explores spin transport in 2D materials using ferromagnetic resonance (FMR) modulation. Spin pumping reveals superconducting symmetries, gate-controlled transport in electron gases, and valley-selective excitations in dichalcogenides for spintronics.

Keywords:
atomic layer compoundferromagnetic resonancespin currentspin pumpingsuperconductivitytwo-dimensional electron gas

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Mechanics

Background:

  • Spin transport phenomena are crucial for next-generation spintronics.
  • Ferromagnetic resonance (FMR) modulation offers a powerful technique to probe these phenomena.
  • Two-dimensional (2D) systems coupled to magnetic materials exhibit unique spin dynamics.

Purpose of the Study:

  • To review recent theoretical advancements in understanding spin transport via FMR modulation in 2D systems.
  • To highlight the application of FMR modulation in probing superconductivity, electron gases, and transition-metal dichalcogenides.
  • To showcase the potential of spin pumping as a versatile tool for spintronics.

Main Methods:

  • Theoretical analysis of spin pumping effects at interfaces.
  • Investigation of FMR linewidth enhancements in 2D superconductors.
  • Examination of FMR modulation in semiconductor heterostructures with spin-orbit interactions.
  • Study of spin pumping in monolayer transition-metal dichalcogenides.

Main Results:

  • FMR linewidth enhancements serve as sensitive probes for superconducting pairing symmetries.
  • Gate-controlled spin transport and persistent spin textures are achievable in 2D electron gases due to spin-orbit interactions.
  • Spin pumping in transition-metal dichalcogenides leads to valley-selective spin excitations influenced by spin-valley coupling and Berry curvature.

Conclusions:

  • FMR modulation via spin pumping is a versatile technique for investigating spin-dependent phenomena in low-dimensional systems.
  • These findings provide a foundation for developing novel spintronics devices.
  • The theoretical developments pave the way for experimental exploration of spin dynamics in various 2D materials.