% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{AntogniniSilva:1020446,
      author       = {Antognini Silva, David},
      collaboration = {Rüssmann, Philipp and Blügel, Stefan},
      title        = {{M}aterials for quantum computing : {M}agnetic impurities
                      embedded in superconductors from first principles},
      reportid     = {FZJ-2024-00166},
      year         = {2023},
      abstract     = {In the last decades, immense technological and scientific
                      progress was made thanks to the increasing available
                      calculation power provided by the exponential growth of
                      processor capability. However, the miniaturization of
                      transistors is reaching the physical limits of classical
                      processor architectures. In the future, the next big leap
                      for scientific computing is expected to come from the
                      realization of quantum computers. Making more performant
                      quantum computing platforms requires to overcome challenges
                      of decoherence and dephasing of the qubits that form the
                      building blocks for quantum computers. Topological
                      protection is a viable way towards the realization of fault
                      tolerant qubits.Materials that combine magnetism, spin-orbit
                      interaction and conventional s-wave superconductivity are a
                      suitable platform to study Majorana zero modes (MZM) [1],
                      that can be used as building blocks for fault-tolerant
                      topological qubits. In general, magnetic impurities in
                      superconductors leads to localized Yu-Shiba-Rusinov (YSR)
                      states at the impurity [2]. Understanding their interplay
                      with MZMs is crucial to achieve topological quantum
                      computers in the future. In our work, we implemented the
                      Bogoliubov-de Gennes (BdG) formalism in the juKKR
                      Korringa-Kohn-Rostoker Green function impurity code [3] to
                      allow the material-specific description of defects perfectly
                      embedded in superconductors from first principles. We apply
                      it to an Fe impurity embedded in bulk Pb in the normal and
                      superconducting state, then analyze the YSR states of
                      different magnetic transition-metal adatoms placed on a
                      superconducting Nb(110) surface where the influence of the
                      impurity-substrate distance on the energy of the YSR states
                      is discussed.[1] Nadj-Perge et al., Science 346, 6209
                      (2014).[2] L. Yu, Acta Physica Sinica 21, 75 (1965); H.
                      Shiba, Prog. Theor. Phys. 40, 435 (1968); A. I. Rusinov,
                      Sov. J. Exp. Theor. Phys. 29, 1101 (1969).[3]
                      https://iffgit.fz-juelich.de/kkr/jukkr},
      month         = {May},
      date          = {2023-05-29},
      organization  = {EMRS Spring Meeting 2023, Strasbourg
                       (France), 29 May 2023 - 2 Jun 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/1020446},
}