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@ARTICLE{Knippertz:894720,
      author       = {Knippertz, Johannes and Kelly, Leah L. and Franke, Markus
                      and Kumpf, Christian and Cinchetti, Mirko and Aeschlimann,
                      Martin and Stadtmüller, Benjamin},
      title        = {{V}ertical bonding distances and interfacial band structure
                      of {PTCDA} on a {S}n-{A}g surface alloy},
      journal      = {Physical review / B},
      volume       = {102},
      number       = {7},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2021-03372},
      pages        = {075447},
      year         = {2020},
      abstract     = {Molecular materials enable a vast variety of
                      functionalities for novel electronic and spintronic devices.
                      The unique possibility to alter organic molecules or
                      metallic substrates offers the opportunity to optimize
                      interfacial properties for almost any desired field of
                      application. For this reason, we extend the successful
                      approach to control metal-organic interfaces by surface
                      alloying. We present a comprehensive characterization of the
                      structural and electronic properties of the interface formed
                      between the prototypical molecule PTCDA and a Sn-Ag surface
                      alloy grown on an Ag(111) single crystal surface. We monitor
                      the changes of adsorption height of the surface alloy atoms
                      and electronic valence band structure upon adsorption of one
                      layer of PTCDA using the normal incidence x-ray standing
                      wave technique in combination with momentum-resolved
                      photoelectron spectroscopy. We find that the vertical
                      buckling and the surface band structure of the SnAg2 surface
                      alloy is not altered by the adsorption of one layer of
                      PTCDA, in contrast to our recent study of PTCDA on a PbAg2
                      surface alloy [B. Stadtmüller et al., Phys. Rev. Lett. 117,
                      096805 (2016)]. In addition, the vertical adsorption
                      geometry of PTCDA and the interfacial energy level alignment
                      indicate the absence of any chemical interaction between the
                      molecule and the surface alloy. We attribute the different
                      interactions at these PTCDA/surface alloy interfaces to the
                      presence or absence of local σ-bonds between the PTCDA
                      oxygen atoms and the surface atoms. Combining our findings
                      with results from literature, we are able to propose an
                      empiric rule for engineering the surface band structure of
                      alloys by adsorption of organic molecules.},
      cin          = {PGI-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-3-20110106},
      pnm          = {5213 - Quantum Nanoscience (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5213},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000563710400006},
      doi          = {10.1103/PhysRevB.102.075447},
      url          = {https://juser.fz-juelich.de/record/894720},
}