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      Spintronic properties of zigzag-edged triangular graphene flakes

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      Author(s)
      Şahin, H.
      Senger, R. T.
      Çıracı, Salim
      Date
      2010
      Source 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
      Article
      Item Usage Stats
      189
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      113
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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 state
      Edge-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
      Permalink
      http://hdl.handle.net/11693/22191
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.3489919
      Collections
      • Department of Physics 2397
      • Institute of Materials Science and Nanotechnology (UNAM) 1930
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