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Updated: Jun 18, 2025
09:48
Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma
Published on: February 2, 2012
15.3K
Magnetic clusters as efficient EY-like spin-scattering centres in graphene
Wout Keijers1, Ramasamy Murugesan2, Guillaume Libeert1
1Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium. ewald.janssens@kuleuven.be.
Nanoscale
|August 5, 2024
Summary
Magnetic nickel clusters on graphene cause spin scattering via an Elliot-Yafet mechanism. This study quantifies spin-orbit coupling effects from these adsorbates using transport measurements and theoretical calculations.
Area of Science:
- Condensed matter physics
- Materials science
- Surface science
Background:
- Graphene's unique electronic properties are sensitive to surface modifications.
- Magnetic adsorbates can significantly alter electron spin dynamics in 2D materials.
Purpose of the Study:
- To investigate spin scattering mechanisms induced by magnetic nickel clusters on graphene.
- To quantify the impact of these clusters on graphene's spin transport properties.
Main Methods:
- Fabrication and characterization of a graphene field-effect transistor (FET) with nickel clusters.
- Transport measurements to probe spin scattering.
- First-principles density functional theory (DFT) calculations combined with a tight-binding model.
Main Results:
- Nickel clusters act as significant spin scatterers on graphene.
- An Elliot-Yafet-like spin scattering mechanism was identified.
- The strength of induced spin-orbit coupling by the clusters was quantified.
Conclusions:
- Atomically precise nickel clusters introduce measurable spin scattering in graphene.
- The findings provide insights into controlling spin dynamics in graphene-based spintronic devices.
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