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Optimized Fabrication Procedure for High-Quality Graphene-based Moir&#233; Superlattice Devices
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Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

Disorder-based graphene spintronics.

A R Rocha1, Thiago B Martins, A Fazzio

  • 1Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil. alexandre.rocha@ufabc.edu.br

Nanotechnology
|July 31, 2010
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate perfect spin filtering in doped graphene nanoribbons. Disorder-driven mechanisms enable 100% spin polarization of current, advancing spintronics and nanoscale electronics.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Nanotechnology

Background:

  • Spintronics utilizes electron spin for information processing.
  • Graphene nanoribbons are promising for nanoscale electronics.
  • Defects in nanostructures often degrade electronic properties.

Purpose of the Study:

  • To investigate spin selectivity in doped graphene nanoribbons.
  • To explore the role of disorder in spin filtering.
  • To demonstrate a novel mechanism for achieving perfect spin polarization.

Main Methods:

  • Ab initio density functional theory calculations.
  • Non-equilibrium Green's functions (NEGF) simulations.
  • Analysis of electron transport in doped graphene nanoribbons.

Main Results:

  • Achieved perfect spin selectivity in doped graphene nanoribbons.
  • Demonstrated 100% spin polarization of current from unpolarized electrons.
  • Identified disorder-driven spin filtering due to differing spin-channel localization lengths.

Conclusions:

  • Doped graphene nanoribbons can function as perfect spin filters.
  • Random disorder can induce significant spin polarization.
  • This work presents a new disorder-driven mechanism for spin filtering in spintronic devices.