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Updated: Aug 3, 2025
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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
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Inducing Single Spin-Polarized Flat Bands in Monolayer Graphene
Matteo Jugovac1, Iulia Cojocariu1,2,3, Jaime Sánchez-Barriga4,5
1Elettra - Sincrotrone Trieste, S.S. 14 - km 163.5, Basovizza, 34149, Trieste, Italy.
Advanced Materials (Deerfield Beach, Fla.)
|April 10, 2023
Summary
Europium doping of graphene generates single spin-polarized flat bands, crucial for spintronics. This controlled doping creates exotic electronic states for novel spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Flat electronic bands in 2D materials like graphene are key for spintronics.
- These bands are essential for exotic topological spin textures and symmetry-broken phases.
Purpose of the Study:
- To investigate the generation of single spin-polarized bands in graphene via europium doping.
- To explore the impact of europium positioning on band formation and electronic properties.
Main Methods:
- Europium (Eu) doping of monolayer graphene on a Co(0001) surface.
- Spin- and angle-resolved photoemission spectroscopy (ARPES).
- Density functional theory (DFT) calculations.
Main Results:
- Controlled Eu doping created distinct single spin-polarized bands based on Eu position.
- Eu on top formed a parabolic band near the Fermi energy.
- Eu intercalated underneath formed a spin-polarized π* flat band, opening a bandgap and acting as a spin filter.
Conclusions:
- Europium doping effectively generates single spin-polarized flat bands in graphene.
- This controlled manipulation of electronic states opens avenues for advanced spintronic devices.
- The study highlights novel exotic electronic and magnetic states achievable through targeted doping.
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