Giant Magnetoconductance Oscillations in Hybrid Superconductor−Semiconductor Core/Shell Nanowire Devices

The magnetotransport of GaAs/InAs core/shell nanowires contacted by two superconducting Nb electrodes is investigated, where the InAs shell forms a tube-like conductive channel around the highly resistive GaAs core. By applying a magnetic field along the nanowire axis, regular magnetoconductance osc...

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Veröffentlicht in:	Nano letters 2014-11, Vol.14 (11), p.6269-6274
Hauptverfasser:	Gül, Ö, Günel, H. Y, Lüth, H, Rieger, T, Wenz, T, Haas, F, Lepsa, M, Panaitov, G, Grützmacher, D, Schäpers, Th
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Sprache:	eng
Schlagworte:	Amplitudes Applied sciences Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Electrodes Electronics Exact sciences and technology Gallium arsenide Gallium arsenides Indium arsenides Magnetic properties and materials Magnetic properties of nanostructures Materials science Molecular electronics, nanoelectronics Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Nanowires Oscillations Physics Quantum wires Reflection Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
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creator	Gül, Ö Günel, H. Y Lüth, H Rieger, T Wenz, T Haas, F Lepsa, M Panaitov, G Grützmacher, D Schäpers, Th
description	The magnetotransport of GaAs/InAs core/shell nanowires contacted by two superconducting Nb electrodes is investigated, where the InAs shell forms a tube-like conductive channel around the highly resistive GaAs core. By applying a magnetic field along the nanowire axis, regular magnetoconductance oscillations with an amplitude in the order of e 2/h are observed. The oscillation amplitude is found to be larger by 2 orders of magnitude compared to the measurements of a reference sample with normal metal contacts. For the Nb-contacted core/shell nanowire the oscillation period corresponds to half a flux quantum Φ0/2 = h/2e in contrast to the period of Φ0 of the reference sample. The strongly enhanced magnetoconductance oscillations are explained by phase-coherent resonant Andreev reflections at the Nb-core/shell nanowire interface.
doi_str_mv	10.1021/nl502598s
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The strongly enhanced magnetoconductance oscillations are explained by phase-coherent resonant Andreev reflections at the Nb-core/shell nanowire interface.</description><identifier>ISSN: 1530-6984</identifier><identifier>EISSN: 1530-6992</identifier><identifier>DOI: 10.1021/nl502598s</identifier><identifier>PMID: 25300066</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Amplitudes ; Applied sciences ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Cross-disciplinary physics: materials science; rheology ; Electrodes ; Electronics ; Exact sciences and technology ; Gallium arsenide ; Gallium arsenides ; Indium arsenides ; Magnetic properties and materials ; Magnetic properties of nanostructures ; Materials science ; Molecular electronics, nanoelectronics ; Nanocrystalline materials ; Nanoscale materials and structures: fabrication and characterization ; Nanowires ; Oscillations ; Physics ; Quantum wires ; Reflection ; Semiconductor electronics. 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subjects	Amplitudes Applied sciences Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Electrodes Electronics Exact sciences and technology Gallium arsenide Gallium arsenides Indium arsenides Magnetic properties and materials Magnetic properties of nanostructures Materials science Molecular electronics, nanoelectronics Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Nanowires Oscillations Physics Quantum wires Reflection Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
title	Giant Magnetoconductance Oscillations in Hybrid Superconductor−Semiconductor Core/Shell Nanowire Devices
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