Robustness of Majorana bound states in the short-junction limit

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)
30 Downloads (Pure)

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.

Original languageEnglish
Article number115421
Number of pages13
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume95
Issue number11
DOIs
Publication statusPublished - 17 Mar 2017

Fingerprint Dive into the research topics of 'Robustness of Majorana bound states in the short-junction limit'. Together they form a unique fingerprint.

Cite this