| Autor: |
Gül Ö; Peter Grünberg Institute (PGI-9) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich GmbH , 52425 Jülich, Germany., Günel HY, Lüth H, Rieger T, Wenz T, Haas F, Lepsa M, Panaitov G, Grützmacher D, Schäpers T |
| Jazyk: |
angličtina |
| Zdroj: |
Nano letters [Nano Lett] 2014 Nov 12; Vol. 14 (11), pp. 6269-74. Date of Electronic Publication: 2014 Oct 21. |
| DOI: |
10.1021/nl502598s |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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