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@INPROCEEDINGS{Rssmann:1020362,
      author       = {Rüssmann, Philipp and Blügel, Stefan},
      title        = {{S}crutinizing a superconductor-topological insulator
                      interface as a platform for topological superconductivity},
      reportid     = {FZJ-2024-00095},
      year         = {2023},
      abstract     = {Interfacing a topological insulator (TI) with an s-wave
                      superconductor (SC) is a promising material platform that
                      offers the possibility to realize a topological
                      superconductor through which Majorana-based topologically
                      protected qubits can be engineered. In our computational
                      study of the prototypical SC/TI interface between Nb and
                      Bi2Te3, we identify the benefits and possible bottlenecks of
                      this potential Majorana material platform. Bringing Nb in
                      contact with the TI film induces charge doping from the SC
                      to the TI, which shifts the Fermi level into the TI
                      conduction band. For thick TI films, this results in band
                      bending leading to the population of trivial TI quantum-well
                      states at the interface. In the superconducting state, we
                      uncover that the topological surface state experiences a
                      sizable superconducting gap-opening at the SC/TI interface,
                      which is furthermore robust against fluctuations of the
                      Fermi energy. We also show that the trivial interface state
                      is only marginally proximitized, potentially obstructing the
                      realization of Majorana-based qubits in this material
                      platform.},
      month         = {Mar},
      date          = {2023-03-05},
      organization  = {APS March Meeting 2023, Las Vegas
                       (USA), 5 Mar 2023 - 10 Mar 2023},
      subtyp        = {Other},
      cin          = {IAS-1 / PGI-1},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106},
      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)6},
      url          = {https://juser.fz-juelich.de/record/1020362},
}