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Updated: Feb 9, 2026
10:23
Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
Published on: November 5, 2015
14.5K
Weak localization in bilayer graphene with Li-intercalation/desorption.
Y Endo1, S Ichinokura1, R Akiyama1
1Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan.
Summary
Lithium intercalation in bilayer graphene alters its electrical properties. Desorbing lithium changes resistivity and magnetoconductance, indicating modified carrier transport and stacking structures.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Bilayer graphene exhibits unique electronic properties influenced by substrate and intercalation.
- Understanding carrier transport mechanisms is crucial for advanced electronic applications.
Purpose of the Study:
- To investigate the effects of Li intercalation and subsequent desorption on the electrical transport properties of bilayer graphene.
- To analyze the changes in magnetoconductance and carrier scattering mechanisms.
Main Methods:
- In-situ electrical transport measurements on SiC-grown bilayer graphene.
- Li-intercalation and Li-desorption processes.
- Analysis of magnetoconductance using the extended Hikami-Larkin-Nagaoka equation.
Main Results:
- Li-desorbed bilayer graphene showed higher resistivity and altered magnetoconductance compared to pristine graphene.
- Weak localization of carriers was observed at low temperatures in all samples.
- Pristine graphene followed the AB stacking model, dominated by electron-electron scattering.
- Li-desorbed graphene exhibited magnetoconductance inconsistent with simple AB or AA stacking, suggesting domain coexistence.
Conclusions:
- Lithium intercalation significantly modifies the electronic structure and transport properties of bilayer graphene.
- The stacking structure of bilayer graphene is complex and can be altered by intercalation/desorption processes.
- Electron-electron scattering and substrate dopants play key roles in carrier transport in pristine bilayer graphene.
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