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

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.

Authors:
 [1];  [1];  [2];  [3];  [3];  [4]
  1. Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy
  2. Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy. Dept. of Electrical Engineering. Dept. of Materials Engineering. Birck Nanotechnology Center
  3. Princeton Univ., NJ (United States). Dept. of Electrical Engineering
  4. Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy. Dept. of Electrical Engineering. Birck Nanotechnology Center
Publication Date:
Research Org.:
Purdue Univ., West Lafayette, IN (United States); Princeton Univ., NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Gordon and Betty Moore Foundation (United States)
OSTI Identifier:
1455140
Grant/Contract Number:  
SC0008630; SC0006671; DMR-1307247; GBMF 4420
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wan, Zhong, Kazakov, Aleksandr, Manfra, Michael J., Pfeiffer, Loren N., West, Ken W., and Rokhinson, Leonid P. Induced superconductivity in high-mobility two-dimensional electron gas in gallium arsenide heterostructures. United States: N. p., 2015. Web. doi:10.1038/ncomms8426.
Wan, Zhong, Kazakov, Aleksandr, Manfra, Michael J., Pfeiffer, Loren N., West, Ken W., & Rokhinson, Leonid P. Induced superconductivity in high-mobility two-dimensional electron gas in gallium arsenide heterostructures. United States. https://doi.org/10.1038/ncomms8426
Wan, Zhong, Kazakov, Aleksandr, Manfra, Michael J., Pfeiffer, Loren N., West, Ken W., and Rokhinson, Leonid P. Thu . "Induced superconductivity in high-mobility two-dimensional electron gas in gallium arsenide heterostructures". United States. https://doi.org/10.1038/ncomms8426. https://www.osti.gov/servlets/purl/1455140.
@article{osti_1455140,
title = {Induced superconductivity in high-mobility two-dimensional electron gas in gallium arsenide heterostructures},
author = {Wan, Zhong and Kazakov, Aleksandr and Manfra, Michael J. and Pfeiffer, Loren N. and West, Ken W. and Rokhinson, Leonid P.},
abstractNote = {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.},
doi = {10.1038/ncomms8426},
journal = {Nature Communications},
number = ,
volume = 6,
place = {United States},
year = {Thu Jun 11 00:00:00 EDT 2015},
month = {Thu Jun 11 00:00:00 EDT 2015}
}

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Cited by: 79 works
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