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@ARTICLE{Du:861799,
      author       = {Du, Nan and Manjunath, Niveditha and Li, Yuan and Menzel,
                      Stephan and Waser, R. and Linn, Eike and You, Tiangui and
                      Bürger, Danilo and Skorupa, Ilona and Walczyk, Damian and
                      Walczyk, Christian and Schmidt, Oliver G. and Schmidt,
                      Heidemarie},
      title        = {{F}ield-{D}riven {H}opping {T}ransport of {O}xygen
                      {V}acancies in {M}emristive {O}xide {S}witches with
                      {I}nterface-{M}ediated {R}esistive {S}witching},
      journal      = {Physical review applied},
      volume       = {10},
      number       = {5},
      issn         = {2331-7019},
      address      = {College Park, Md. [u.a.]},
      publisher    = {American Physical Society},
      reportid     = {FZJ-2019-02227},
      pages        = {054025},
      year         = {2018},
      abstract     = {We investigate the hopping transport of positively charged
                      mobile oxygen vacancies V+o in electroforming-free bipolar
                      memristive BiFeO3 switches by conducting impedance
                      spectroscopy and quasistatic state-test measurements. We
                      demonstrate that BiFeO3 switches with mobile oxygen
                      vacancies (V+o) and fixed substitutional Ti4+ donors on Fe3+
                      lattice sites close to the bottom electrode have a
                      rectifying top electrode with an unflexible barrier height
                      and a rectifying and/or nonrectifying bottom electrode with
                      a flexible barrier height. The field-driven hopping
                      transport of the oxygen vacancies determines the
                      reconfiguration of the flexible barrier and the dynamics of
                      the resistive switching. Average activation energies of 0.53
                      eV for trapping and of 0.31 eV for the release of oxygen
                      vacancies by the Ti4+ donors during application of the SET
                      and RESET excitation pulses are extracted, respectively. The
                      larger activation energy during SET is experimentally
                      verified by impedance spectroscopy measurements and
                      evidences the local enhancement of the electrostatic
                      potential profile at the bottom electrode due to the Ti4+
                      donors on Fe3+ lattice sites.},
      cin          = {PGI-7 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {521 - Controlling Electron Charge-Based Phenomena
                      (POF3-521)},
      pid          = {G:(DE-HGF)POF3-521},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000449792500003},
      doi          = {10.1103/PhysRevApplied.10.054025},
      url          = {https://juser.fz-juelich.de/record/861799},
}