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@ARTICLE{Wei:1020351,
      author       = {Wei, Xiankui and Jalil, Abdur Rehman and Rüssmann, Philipp
                      and Ando, Yoichi and Grützmacher, Detlev and Blügel,
                      Stefan and Mayer, Joachim},
      title        = {{A}tomic {D}iffusion-{I}nduced {P}olarization and
                      {S}uperconductivity in {T}opological {I}nsulator-{B}ased
                      {H}eterostructures},
      journal      = {ACS nano},
      volume       = {18},
      number       = {1},
      issn         = {1936-0851},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2024-00084},
      pages        = {571-580},
      year         = {2024},
      abstract     = {The proximity effect at a highly transparent interface of
                      an s-wave superconductor (S) and a topological insulator
                      (TI) provides a promising platform to create Majorana zero
                      modes in artificially designed heterostructures. However,
                      structural and chemical issues pertinent to such interfaces
                      have been poorly explored so far. Here, we report the
                      discovery of Pd diffusion-induced polarization at interfaces
                      between superconductive Pd1+x(Bi0.4Te0.6)2 (xPBT, 0 ≤ x
                      ≤ 1) and Pd-intercalated Bi2Te3 by using atomic-resolution
                      scanning transmission electron microscopy. Our quantitative
                      image analysis reveals that nanoscale lattice strain and QL
                      polarity synergistically suppress and promote Pd diffusion
                      at the normal and parallel interfaces, formed between
                      Te–Pd–Bi triple layers (TLs) and Te–Bi–Te–Bi–Te
                      quintuple layers (QLs), respectively. Further, our
                      first-principles calculations unveil that the
                      superconductivity of the xPBT phase and topological nature
                      of the Pd-intercalated Bi2Te3 phase are robust against the
                      broken inversion symmetry. These findings point out the
                      necessity of considering the coexistence of electric
                      polarization with superconductivity and topology in such
                      S–TI systems.},
      cin          = {IAS-1 / PGI-1 / ER-C-2 / PGI-9 / JARA-HPC / JARA-FIT},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
                      I:(DE-Juel1)ER-C-2-20170209 / I:(DE-Juel1)PGI-9-20110106 /
                      $I:(DE-82)080012_20140620$ / $I:(DE-82)080009_20140620$},
      pnm          = {5211 - Topological Matter (POF4-521) / DFG project
                      390534769 - EXC 2004: Materie und Licht für
                      Quanteninformation (ML4Q) (390534769)},
      pid          = {G:(DE-HGF)POF4-5211 / G:(GEPRIS)390534769},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {38126781},
      UT           = {WOS:001139622600001},
      doi          = {10.1021/acsnano.3c08601},
      url          = {https://juser.fz-juelich.de/record/1020351},
}