Journal
NATURE COMMUNICATIONS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms8426
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Funding
- National Science Foundation [DMR-1307247]
- Purdue Center for Topological Materials
- US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-SC0008630, DE-SC0006671]
- Gordon and Betty Moore Foundation [GBMF 4420]
- National Science Foundation MRSEC at the Princeton Center for Complex Materials
- U.S. Department of Energy (DOE) [DE-SC0008630] Funding Source: U.S. Department of Energy (DOE)
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1307247] Funding Source: National Science Foundation
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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 mm, 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.
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