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@INPROCEEDINGS{Schpers:153753,
      author       = {Schäpers, Thomas},
      title        = {{Q}uantum {T}ransport in {C}ore/{S}hell {N}anowires},
      school       = {Reykjavik University},
      reportid     = {FZJ-2014-03242},
      year         = {2014},
      abstract     = {Semiconductor nanowires, fabricated by a bottom-up
                      approach, are very promising as building blocks for future
                      nanoscaled electronic devices. In addition, they are also
                      very interesting objects for studying quantum phenomena. In
                      recent years, the focus shifted partly towards more complex
                      nanowire structures, i.e. radial and axial heterostructure
                      nanowires, in order to tailor their electronic properties
                      even better. We investigated GaAs/InAs core/shell nanowires,
                      where the highly conductive InAs shell is wrapped around an
                      insulating GaAs core. At low temperatures pronounced flux
                      periodic magnetoconductance oscillations are observed. These
                      very regular oscillations can be explained by the presence
                      of circular closed-loop quantum states. The
                      magnetoconductance oscillations could even be observed up to
                      temperatures of 50K. By selective wet chemical etching, the
                      GaAs core was removed, leaving a hollow InAs nanowire. Here,
                      flux-periodic oscillations where observed as well. When the
                      GaAs/InAs core/shell nanowire is contacted by two
                      superconducting electrodes the carrier transport is governed
                      by Andreev reflection. In this case the period in the
                      magnetoconductance corresponds to half a flux quantum.},
      organization  = {(Iceland)},
      subtyp        = {Invited},
      cin          = {PGI-9},
      cid          = {I:(DE-Juel1)PGI-9-20110106},
      pnm          = {422 - Spin-based and quantum information (POF2-422)},
      pid          = {G:(DE-HGF)POF2-422},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://juser.fz-juelich.de/record/153753},
}