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@ARTICLE{Lin:894441,
      author       = {Lin, You-Ron and Bagchi, Mahasweta and Soubatch, Serguei
                      and Lee, Tien-Lin and Brede, Jens and Bocquet, François C.
                      and Kumpf, Christian and Ando, Yoichi and Tautz, F. Stefan},
      title        = {{V}ertical position of {S}r dopants in the {S}r x {B}i 2
                      {S}e 3 superconductor},
      journal      = {Physical review / B},
      volume       = {104},
      number       = {5},
      issn         = {2469-9969},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2021-03223},
      pages        = {054506},
      year         = {2021},
      abstract     = {The discovery of topological superconductivity in doped
                      Bi2Se3 made this class of materials highly important for the
                      field of condensed matter physics. However, the structural
                      origin of the superconducting state remained elusive,
                      despite being investigated intensively in recent years. We
                      use scanning tunneling microscopy and the normal incidence
                      x-ray standing wave (NIXSW) technique in order to determine
                      the vertical position of the dopants—one of the key
                      parameters for understanding topological superconductivity
                      in this material— for the case of SrxBi2Se3. In
                      particular, we analyze the NIXSW data in consideration of
                      the inelastic mean free path of the photoemitted electrons,
                      which allows us to distinguish between symmetry-equivalent
                      sites. We find that Sr atoms are not situated inside the van
                      der Waals gap between the Bi2Se3 quintuple layers but rather
                      in the quintuple layer close to the outer Se planes.},
      cin          = {PGI-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-3-20110106},
      pnm          = {5213 - Quantum Nanoscience (POF4-521) / DFG project
                      396769409 - Grundlagen der Photoemissionstomographie},
      pid          = {G:(DE-HGF)POF4-5213 / G:(GEPRIS)396769409},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000684119700007},
      doi          = {10.1103/PhysRevB.104.054506},
      url          = {https://juser.fz-juelich.de/record/894441},
}