Print Email Facebook Twitter Robustness of Majorana bound states in the short-junction limit Title Robustness of Majorana bound states in the short-junction limit Author Sticlet, D.C. (TU Delft QN/Akhmerov Group) Nijholt, B. (TU Delft QN/Akhmerov Group) Akhmerov, A.R. (TU Delft QN/Akhmerov Group) Date 2017-03-17 Abstract We study the effects of strong coupling between a superconductor and a semiconductor nanowire on the creation of the Majorana bound states, when the quasiparticle dwell time in the normal part of the nanowire is much shorter than the inverse superconducting gap. This "short-junction" limit is relevant for the recent experiments using the epitaxially grown aluminum characterized by a transparent interface with the semiconductor and a small superconducting gap. We find that the small superconducting gap does not have a strong detrimental effect on the Majorana properties. Specifically, both the critical magnetic field required for creating a topological phase and the size of the Majorana bound states are independent of the superconducting gap. The critical magnetic field scales with the wire cross section, while the relative importance of the orbital and Zeeman effects of the magnetic field is controlled by the material parameters only: g factor, effective electron mass, and the semiconductor-superconductor interface transparency. To reference this document use: http://resolver.tudelft.nl/uuid:fb627d87-f6b5-453c-8e8b-88817b6c6065 DOI https://doi.org/10.1103/PhysRevB.95.115421 ISSN 1098-0121 Source Physical Review B (Condensed Matter and Materials Physics), 95 (11) Part of collection Institutional Repository Document type journal article Rights © 2017 D.C. Sticlet, B. Nijholt, A.R. Akhmerov Files PDF PhysRevB.95.115421.pdf 1.76 MB Close viewer /islandora/object/uuid:fb627d87-f6b5-453c-8e8b-88817b6c6065/datastream/OBJ/view