Spintronic properties of zigzag-edged triangular graphene flakes
Date
2010Source Title
Journal of Applied Physics
Print ISSN
1089-7550
Publisher
AIP Publishing LLC
Volume
108
Issue
7
Pages
074301-1 - 074301-5
Language
English
Type
ArticleItem Usage Stats
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Abstract
We investigate quantum transport properties of triangular graphene flakes with zigzag edges by using first principles calculations. Triangular graphene flakes have large magnetic moments which vary with the number of hydrogen atoms terminating its edge atoms and scale with its size. Electronic transmission and current-voltage characteristics of these flakes, when contacted with metallic electrodes, reveal spin valve and remarkable rectification features. The transition from ferromagnetic to antiferromagnetic state under bias voltage can, however, terminate the spin polarizing effects for specific flakes. Geometry and size dependent transport properties of graphene flakes may be crucial for spintronic nanodevice applications.
Keywords
Antiferromagnetic stateEdge-atoms
Electronic transmissions
First-principles calculation
Hydrogen atoms
Metallic electrodes
Nanodevice applications
Quantum transport properties
Size dependent
Spin valve
Spintronics
Zigzag edges
Antiferromagnetism
Electric rectifiers
Graphene
Magnetic moments
Quantum chemistry
Quantum electronics
Reaction kinetics
Transport properties
Current voltage characteristics