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@ARTICLE{Heisig:884302,
      author       = {Heisig, Thomas and Kler, Joe and Du, Hongchu and Baeumer,
                      Christoph and Hensling, Felix and Glöß, Maria and Moors,
                      Marco and Locatelli, Andrea and Menteş, Tevfik Onur and
                      Genuzio, Francesca and Mayer, Joachim and De Souza, Roger A.
                      and Dittmann, Regina},
      title        = {{A}ntiphase {B}oundaries {C}onstitute {F}ast {C}ation
                      {D}iffusion {P}aths in {S}r{T}i{O} 3 {M}emristive {D}evices},
      journal      = {Advanced functional materials},
      volume       = {30},
      number       = {48},
      issn         = {1616-3028},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2020-03188},
      pages        = {2004118},
      year         = {2020},
      abstract     = {Resistive switching in transition metal oxide‐based
                      metal‐insulator‐metal structures relies on the
                      reversible drift of ions under an applied electric field on
                      the nanoscale. In such structures, the formation of
                      conductive filaments is believed to be induced by the
                      electric‐field driven migration of oxygen anions, while
                      the cation sublattice is often considered to be inactive.
                      This simple mechanistic picture of the switching process is
                      incomplete as both oxygen anions and metal cations have been
                      previously identified as mobile species under device
                      operation. Here, spectromicroscopic techniques combined with
                      atomistic simulations to elucidate the diffusion and drift
                      processes that take place in the resistive switching model
                      material SrTiO3 are used. It is demonstrated that the
                      conductive filament in epitaxial SrTiO3 devices is not
                      homogenous but exhibits a complex microstructure.
                      Specifically, the filament consists of a conductive
                      Ti3+‐rich region and insulating Sr‐rich islands.
                      Transmission electron microscopy shows that the Sr‐rich
                      islands emerge above Ruddlesden–Popper type antiphase
                      boundaries. The role of these extended defects is clarified
                      by molecular static and molecular dynamic simulations, which
                      reveal that the Ruddlesden–Popper antiphase boundaries
                      constitute diffusion fast‐paths for Sr cations in the
                      perovskites structure.},
      cin          = {PGI-7 / JARA-FIT / ER-C-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)ER-C-2-20170209},
      pnm          = {521 - Controlling Electron Charge-Based Phenomena
                      (POF3-521)},
      pid          = {G:(DE-HGF)POF3-521},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000569775200001},
      doi          = {10.1002/adfm.202004118},
      url          = {https://juser.fz-juelich.de/record/884302},
}