4.7 Article

Direct Measurement of Polarization-Induced Fields in GaN/AlN by Nano-Beam Electron Diffraction

Journal

SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -

Publisher

NATURE PUBLISHING GROUP
DOI: 10.1038/srep28459

Keywords

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Funding

  1. CICYT, Spain [MAT2010-15206]
  2. EU-COST Action [MP0805]
  3. Junta de Andalucia [P09-TEP-5403]
  4. EU-FEDER participation [P09-TEP-5403]
  5. FCT Portugal [PTDC/FIS-NAN/0973/2012, SFRH/BPD/74095/2010]
  6. Juan de la Cierva program [JCI-2012-14509]
  7. Deutsche Forschungsgemeinschaft (DFG) [MU 3660/1-1]
  8. DFG [R02051/11-1]

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The built-in piezoelectric fields in group III-nitrides can act as road blocks on the way to maximizing the efficiency of opto-electronic devices. In order to overcome this limitation, a proper characterization of these fields is necessary. In this work nano-beam electron diffraction in scanning transmission electron microscopy mode has been used to simultaneously measure the strain state and the induced piezoelectric fields in a GaN/AlN multiple quantum well system.

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