1. Robust topological phase in proximitized core–shell nanowires coupled to multiple superconductors
- Author
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Andrei Manolescu, Anna Sitek, Tudor D. Stanescu, Tækni- og verkfræðideild (HR), School of Science and Engineering (RU), Háskólinn í Reykjavík, and Reykjavik University
- Subjects
Quantum phase transition ,Majorana states ,multiple 1D chains ,Topological superconducting phase ,Majorana fermions ,Nanowire ,Rafeindaverkfræði ,FOS: Physical sciences ,General Physics and Astronomy ,02 engineering and technology ,Rúmfræði ,Rafmagnsverkfræði ,lcsh:Chemical technology ,Topology ,lcsh:Technology ,01 natural sciences ,Full Research Paper ,Prismatic geometry ,Phase (matter) ,Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ,0103 physical sciences ,Core-shell nanowires ,Multiple 1D chains ,Nanotechnology ,Energy level ,lcsh:TP1-1185 ,General Materials Science ,Electrical and Electronic Engineering ,lcsh:Science ,010306 general physics ,Critical field ,Phase diagram ,Physics ,Superconductivity ,Condensed Matter - Mesoscale and Nanoscale Physics ,lcsh:T ,021001 nanoscience & nanotechnology ,lcsh:QC1-999 ,topological superconducting phase ,Magnetic field ,Nanótækni ,Nanoscience ,lcsh:Q ,prismatic geometry ,core–shell nanowires ,0210 nano-technology ,lcsh:Physics - Abstract
We consider core–shell nanowires with prismatic geometry contacted with two or more superconductors in the presence of a magnetic field applied parallel to the wire. In this geometry, the lowest energy states are localized on the outer edges of the shell, which strongly inhibits the orbital effects of the longitudinal magnetic field that are detrimental to Majorana physics. Using a tight-binding model of coupled parallel chains, we calculate the topological phase diagram of the hybrid system in the presence of non-vanishing transverse potentials and finite relative phases between the parent superconductors. We show that having finite relative phases strongly enhances the stability of the induced topological superconductivity over a significant range of chemical potentials and reduces the value of the critical field associated with the topological quantum phase transition., This work was partially financed by the research funds of Reykjavik University and by the Icelandic Research Fund. TDS was supported in part by NSF DMR-1414683.
- Published
- 2018
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