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@ARTICLE{Xin:187386,
      author       = {Xin, Huolin L. and Dwyer, Christian and Müller, David},
      title        = {{I}s there a {S}tobbs factor in atomic-resolution
                      {STEM}-{EELS} mapping?},
      journal      = {Ultramicroscopy},
      volume       = {139},
      issn         = {0304-3991},
      address      = {Amsterdam},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2015-01057},
      pages        = {38-46},
      year         = {2014},
      abstract     = {Recent work has convincingly argued that the Stobbs
                      factor—disagreement in contrast between simulated and
                      experimental atomic-resolution images—in ADF-STEM imaging
                      can be accounted for by including the incoherent source size
                      in simulation. However, less progress has been made for
                      atomic-resolution STEM-EELS mapping. Here we have performed
                      carefully calibrated EELS mapping experiments of a [101]
                      DyScO3 single-crystal specimen, allowing atomic-resolution
                      EELS signals to be extracted on an absolute scale for a
                      large range of thicknesses. By simultaneously recording the
                      elastic signal, also on an absolute scale, and using it to
                      characterize the source size, sample thickness and inelastic
                      mean free path, we eliminate all free parameters in the
                      simulation of the core-loss signals. Coupled with double
                      channeling simulations that incorporate both core-loss
                      inelastic scattering and dynamical elastic and thermal
                      diffuse scattering, the present work enables a close
                      scrutiny of the scattering physics in the inelastic channel.
                      We found that by taking into account the effective source
                      distribution determined from the ADF images, both the
                      absolute signal and the contrast in atomic-resolution Dy-M5
                      maps can be closely reproduced by the double-channeling
                      simulations. At lower energy losses, discrepancies are
                      present in the Sc-L2,3 and Dy-N4,5 maps due to the
                      energy-dependent spatial distribution of the background
                      spectrum, core-hole effects, and omitted complexities in the
                      final states. This work has demonstrated the possibility of
                      using quantitative STEM-EELS for element-specific
                      column-by-column atom counting at higher energy losses and
                      for atomic-like final states, and has elucidated several
                      possible improvements for future theoretical work.},
      cin          = {PGI-5},
      ddc          = {570},
      cid          = {I:(DE-Juel1)PGI-5-20110106},
      pnm          = {42G - Peter Grünberg-Centre (PG-C) (POF2-42G41)},
      pid          = {G:(DE-HGF)POF2-42G41},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000332531400006},
      doi          = {10.1016/j.ultramic.2014.01.006},
      url          = {https://juser.fz-juelich.de/record/187386},
}