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Homogeneous pinhole free 1 nm AlO tunnel barriers on graphene

Applied Physics Letters, ISSN: 0003-6951, Vol: 101, Issue: 20
2012
  • 28
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Metrics Details

  • Citations
    28
    • Citation Indexes
      28
  • Captures
    61

Article Description

We report on the topographical and electrical characterisations of 1 nm thick AlO dielectric films on graphene. The Al O is grown by sputtering a 0.6 nm Al layer on graphene and subsequentially oxidizing it in an O atmosphere. The Al O layer presents no pinholes and is homogeneous enough to act as a tunnel barrier. A resistance-area product in the mega-ohm micrometer-square range is found. Comparatively, the growth of Al O by evaporation does not lead to well-wetted films on graphene. Application of this high quality sputtered tunnel barrier to efficient spin injection in graphene is discussed. © 2012 American Institute of Physics.

Bibliographic Details

B. Dlubak; M. B. Martin; C. Deranlot; K. Bouzehouane; S. Fusil; R. Mattana; F. Petroff; A. Anane; P. Seneor; A. Fert

AIP Publishing

Physics and Astronomy

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