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Anomalous quantized conductance in a half-metal/topological superconductor/half-metal junction.
- Source :
-
Journal of physics. Condensed matter : an Institute of Physics journal [J Phys Condens Matter] 2014 Apr 30; Vol. 26 (17), pp. 175702. Date of Electronic Publication: 2014 Apr 11. - Publication Year :
- 2014
-
Abstract
- The composite topological superconductor (TS), which is made of one-dimensional spin-orbit coupled nanowire with proximity-induced superconductivity from an s-wave superconductor, is not a pure p-wave superconductor, but has a suppressed s-wave pairing. We calculate the conductance spectrum of a half-metal/TS/half-metal junction in order to probe the pairing states and the spin texture of the p-wave pairing. It is found that, besides the regular quantized conductance peak contributed by Majorana fermions (MFs) when the half-metal magnetization is parallel to the MF spin, an anomalous quantized conductance peak exists when they are almost antiparallel. The physical origin is the MF-assisted local Andreev reflection to condense s-wave pairings. The anomalous quantized conductance is also confirmed by the Kitaev's p-wave model with a nonzero s-wave pairing. The findings might provide a new way to find the MF.
Details
- Language :
- English
- ISSN :
- 1361-648X
- Volume :
- 26
- Issue :
- 17
- Database :
- MEDLINE
- Journal :
- Journal of physics. Condensed matter : an Institute of Physics journal
- Publication Type :
- Academic Journal
- Accession number :
- 24721729
- Full Text :
- https://doi.org/10.1088/0953-8984/26/17/175702