Transparent Semiconductor-Superconductor Interface and Induced Gap in an Epitaxial Heterostructure Josephson Junction

@article{Kjaergaard2017TransparentSI,
  title={Transparent Semiconductor-Superconductor Interface and Induced Gap in an Epitaxial Heterostructure Josephson Junction},
  author={M. Kjaergaard and H. Suominen and M. Nowak and A. Akhmerov and J. Shabani and C. Palmstr{\o}m and F. Nichele and C. Marcus},
  journal={Physical review applied},
  year={2017},
  volume={7},
  pages={034029}
}
  • M. Kjaergaard, H. Suominen, +5 authors C. Marcus
  • Published 2017
  • Physics, Materials Science
  • Physical review applied
  • Measurement of multiple Andreev Reflection (MAR) in a Josephson junction made from an InAs quantum well heterostructure with epitaxial aluminum is used to quantify a highly transparent effective semiconductor-superconductor interface with near-unity transmission. The observed temperature dependence of MAR does not follow a conventional BCS form but instead agrees with a model in which the density of states in the quantum well acquires an effective induced gap, in our case, 180 μeV, close to… CONTINUE READING
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