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      Spin confinement in the superlattices of graphene ribbons

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      Author(s)
      Topsakal, M.
      Sevinçli, H.
      Çıracı, Salim
      Date
      2008
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Publisher
      AIP Publishing
      Volume
      92
      Issue
      17
      Pages
      173118-1 - 173118-3
      Language
      English
      Type
      Article
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      Abstract
      Based on first-principles calculations, we showed that repeated heterostructures of zigzag graphene nanoribbons of different widths form multiple quantum well structures. Edge states of specific spin directions can be confined in these wells. The electronic and magnetic state of the ribbon can be modulated in real space. In specific geometries, the absence of reflection symmetry causes the magnetic ground state of whole heterostructure to change from antiferromagnetic to ferrimagnetic. These quantum structures of different geometries provide unique features for spintronic applications.
      Keywords
      Antiferromagnetism
      Ground state
      Heterojunctions
      Magnetoelectronics
      Semiconductor quantum wells
      Superlattices
      Graphene nanoribbons
      Magnetic states
      Spin confinement
      Spin directions
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      Permalink
      http://hdl.handle.net/11693/23124
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.2919525
      Collections
      • Department of Physics 2397
      • Institute of Materials Science and Nanotechnology (UNAM) 1930
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