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@ARTICLE{Yu:867952,
      author       = {Yu, Yuan and Zhang, Siyuan and Mio, Antonio Massimiliano
                      and Gault, Baptiste and Sheskin, Ariel and Scheu, Christina
                      and Raabe, Dierk and Zu, Fangqiu and Wuttig, Matthias and
                      Amouyal, Yaron and Cojocaru-Mirédin, Oana},
      title        = {{A}g-{S}egregation to {D}islocations in {P}b{T}e-{B}ased
                      {T}hermoelectric {M}aterials},
      journal      = {ACS applied materials $\&$ interfaces},
      volume       = {10},
      number       = {4},
      issn         = {1944-8252},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2019-06545},
      pages        = {3609 - 3615},
      year         = {2018},
      abstract     = {Dislocations have been considered to be an efficient source
                      for scattering midfrequency phonons, contributing to the
                      enhancement of thermoelectric performance. The structure of
                      dislocations can be resolved by electron microscopy whereas
                      their chemical composition and decoration state are scarcely
                      known. Here, we correlate transmission Kikuchi diffraction
                      and (scanning) transmission electron microscopy in
                      conjunction with atom probe tomography to investigate the
                      local structure and chemical composition of dislocations in
                      a thermoelectric Ag-doped PbTe compound. Our investigations
                      indicate that Ag atoms segregate to dislocations with a
                      10-fold excess of Ag compared with its average concentration
                      in the matrix. Yet the Ag concentration along the
                      dislocation line is not constant but fluctuates from ∼0.8
                      to ∼10 atom $\%$ with a period of about 5 nm. Thermal
                      conductivity is evaluated applying laser flash analysis, and
                      is correlated with theoretical calculations based on the
                      Debye–Callaway model, demonstrating that these
                      Ag-decorated dislocations yield stronger phonon scatterings.
                      These findings reduce the knowledge gap regarding the
                      composition of dislocations needed for theoretical
                      calculations of phonon scattering and pave the way for
                      extending the concept of defect engineering to
                      thermoelectric materials.},
      cin          = {PGI-10},
      ddc          = {600},
      cid          = {I:(DE-Juel1)PGI-10-20170113},
      pnm          = {521 - Controlling Electron Charge-Based Phenomena
                      (POF3-521)},
      pid          = {G:(DE-HGF)POF3-521},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:29309116},
      UT           = {WOS:000424728800052},
      doi          = {10.1021/acsami.7b17142},
      url          = {https://juser.fz-juelich.de/record/867952},
}