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@ARTICLE{Zellekens:887745,
      author       = {Zellekens, Patrick and Deacon, Russell and Perla, Pujitha
                      and Fonseka, H. Aruni and Mörstedt, Timm and Hindmarsh,
                      Steven A. and Bennemann, Benjamin and Lentz, Florian and
                      Lepsa, Mihail I. and Sanchez, Ana M. and Grützmacher,
                      Detlev and Ishibashi, Koji and Schäpers, Thomas},
      title        = {{H}ard-{G}ap {S}pectroscopy in a {S}elf-{D}efined
                      {M}esoscopic {I}n{A}s/{A}l {N}anowire {J}osephson
                      {J}unction},
      journal      = {Physical review applied},
      volume       = {14},
      number       = {5},
      issn         = {2331-7019},
      address      = {College Park, Md. [u.a.]},
      publisher    = {American Physical Society},
      reportid     = {FZJ-2020-04402},
      pages        = {054019},
      year         = {2020},
      abstract     = {Superconductor-semiconductor-nanowire hybrid structures can
                      serve as versatile building blocks to realize Majorana
                      circuits or superconducting qubits based on quantized levels
                      such as Andreev qubits. For all these applications, it is
                      essential that the superconductor-semiconductor interface is
                      as clean as possible. Furthermore, the shape and dimensions
                      of the superconducting electrodes need to be precisely
                      controlled. We fabricated self-defined InAs/Al core-shell
                      nanowire junctions by a fully in-situ approach, which meet
                      all these criteria. Transmission electron microscopy
                      measurements confirm the sharp and clean interface between
                      the nanowire and the in-situ deposited Al electrodes that
                      are formed by means of shadow evaporation. Furthermore, we
                      report on tunnel spectroscopy, gate, and magnetic
                      field-dependent transport measurements. The achievable short
                      junction lengths, the observed hard gap, and the magnetic
                      field robustness make this hybrid structure very attractive
                      for applications that rely on a precise control of the
                      number of subgap states, like Andreev qubits or topological
                      systems.},
      cin          = {PGI-9 / PGI-10 / JARA-FIT / HNF},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-9-20110106 / I:(DE-Juel1)PGI-10-20170113 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)HNF-20170116},
      pnm          = {522 - Controlling Spin-Based Phenomena (POF3-522) / DFG
                      project 390534769 - EXC 2004: Materie und Licht für
                      Quanteninformation (ML4Q) (390534769)},
      pid          = {G:(DE-HGF)POF3-522 / G:(GEPRIS)390534769},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000587961000002},
      doi          = {10.1103/PhysRevApplied.14.054019},
      url          = {https://juser.fz-juelich.de/record/887745},
}