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Induced superconductivity in high-mobility two-dimensional electron gas in gallium arsenide heterostructures

Author

Listed:
  • Zhong Wan

    (Purdue University)

  • Aleksandr Kazakov

    (Purdue University)

  • Michael J. Manfra

    (Purdue University
    Purdue University
    Purdue University
    Birck Nanotechnology Center, Purdue University)

  • Loren N. Pfeiffer

    (Princeton University)

  • Ken W. West

    (Princeton University)

  • Leonid P. Rokhinson

    (Purdue University
    Purdue University
    Birck Nanotechnology Center, Purdue University)

Abstract

Search for Majorana fermions renewed interest in semiconductor–superconductor interfaces, while a quest for higher-order non-Abelian excitations demands formation of superconducting contacts to materials with fractionalized excitations, such as a two-dimensional electron gas in a fractional quantum Hall regime. Here we report induced superconductivity in high-mobility two-dimensional electron gas in gallium arsenide heterostructures and development of highly transparent semiconductor–superconductor ohmic contacts. Supercurrent with characteristic temperature dependence of a ballistic junction has been observed across 0.6 μm, a regime previously achieved only in point contacts but essential to the formation of well separated non-Abelian states. High critical fields (>16 T) in NbN contacts enables investigation of an interplay between superconductivity and strongly correlated states in a two-dimensional electron gas at high magnetic fields.

Suggested Citation

  • Zhong Wan & Aleksandr Kazakov & Michael J. Manfra & Loren N. Pfeiffer & Ken W. West & Leonid P. Rokhinson, 2015. "Induced superconductivity in high-mobility two-dimensional electron gas in gallium arsenide heterostructures," Nature Communications, Nature, vol. 6(1), pages 1-5, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8426
    DOI: 10.1038/ncomms8426
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