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@ARTICLE{MllerCaspary:860624,
      author       = {Müller-Caspary, Knut and Grieb, Tim and Müßener, Jan and
                      Gauquelin, Nicolas and Hille, Pascal and Schörmann, Jörg
                      and Verbeeck, Johan and Van Aert, Sandra and Eickhoff,
                      Martin and Rosenauer, Andreas},
      title        = {{E}lectrical {P}olarization in {A}l{N}/{G}a{N} {N}anodisks
                      {M}easured by {M}omentum-{R}esolved 4{D} {S}canning
                      {T}ransmission {E}lectron {M}icroscopy},
      journal      = {Physical review letters},
      volume       = {122},
      number       = {10},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2019-01297},
      pages        = {106102},
      year         = {2019},
      abstract     = {We report the mapping of polarization-induced internal
                      electric fields in AlN/GaN nanowire heterostructures at unit
                      cell resolution as a key for the correlation of optical and
                      structural phenomena in semiconductor optoelectronics.
                      Momentum-resolved aberration-corrected scanning transmission
                      electron microscopy is employed as a new imaging mode that
                      simultaneously provides four-dimensional data in real and
                      reciprocal space. We demonstrate how internal mesoscale and
                      atomic electric fields can be separated in an experiment,
                      which is verified by comprehensive dynamical simulations of
                      multiple electron scattering. A mean difference of
                      5.3±1.5  MV/cm is found for the polarization-induced
                      electric fields in AlN and GaN, being in accordance with
                      dedicated simulations and photoluminescence measurements in
                      previous publications.},
      cin          = {ER-C-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)
                      / moreSTEM - Momentum-resolved Scanning Transmission
                      Electron Microscopy (VH-NG-1317)},
      pid          = {G:(DE-HGF)POF3-143 / G:(DE-HGF)VH-NG-1317},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30932647},
      UT           = {WOS:000461067700007},
      doi          = {10.1103/PhysRevLett.122.106102},
      url          = {https://juser.fz-juelich.de/record/860624},
}