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Majorana fermions in well aligned InSb-nanowires with superconducting and normal contacts

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These file attachments have been under embargo and were made available to the public after the embargo was lifted on 21 November 2012.

Author: Van Woerkom, D.J.
Mentor: Kouwenhoven, L.P. · Mourik, V. · Zuo, K.
Faculty:Applied Sciences
Department:Quantum Nanoscience
Programme:Quantum Transport
Type:Master thesis
Date:2012-11-21
Embargo lifted:2012-11-21
Keywords: Majorana · nanowire · superconductor · superconductivity · pi-junction
Rights: (c) 2012 Van Woerkom, D.J.

Abstract

In this Master thesis I report results on a route to find Majorana fermions in indium antimonide nanowires in contact with a superconductor. Theoretically Majorana fermions appear in one-dimensional nanowires with strong spin-orbit coupling, in proximity with a superconductor and an external magnetic field applied parallel to the nanowire. The nanowires are deposited by a deterministic method, in this way the external magnetic field is perfect aligned with the nanowires up to a few degrees. Results we observed are a possible magnetic field tunable pi-junction, measurements of an induced gap in the nanowire and a robust zero-bias peak that persist in both gate and magnetic field scans. This zero-bias peak can be split and recombine with varying the applied magnetic field and the local gate potential.

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