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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
First-principles study of spin-dependent transport through graphene/BNC/graphene structure
1Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan. ono@prec.eng.osaka-u.ac.jp.
Nanoscale Research Letters
|May 3, 2013
Summary
This study explores boron nitride sheet (BNC) structures, finding that smaller, isolated graphene flakes exhibit increased magnetic ordering. Transport properties of these BNC structures are spin-dependent.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Computational Chemistry
Background:
- Boron nitride nanosheets (BNC) offer unique electronic properties.
- Understanding the interplay between graphene flakes and hexagonal boron nitride is crucial for novel electronic devices.
Purpose of the Study:
- Investigate the electronic structure and transport properties of BNC structures.
- Analyze the impact of graphene flake size and isolation on magnetic ordering.
- Examine spin polarization in BNC structures connected to graphene electrodes.
Main Methods:
- First-principles calculations.
- Density Functional Theory (DFT) for electronic structure.
- Transport calculations.
Main Results:
- Magnetic ordering of graphene flakes increases with smaller size and greater isolation within the boron nitride matrix.
- Spin-polarized charge-density distribution is localized to the graphene flake region when connected to electrodes.
- Graphene electrodes remain non-spin-polarized.
Conclusions:
- BNC structures exhibit tunable magnetic properties based on graphene flake geometry.
- The transport properties of BNC are intrinsically spin-dependent.
- These findings suggest potential applications in spintronics.
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