Eberly College of Arts and Sciences
Physics and Astronomy
We consider core–shell nanowires with prismatic geometry contacted with two or more superconductors in the presence of a mag- netic 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.
Digital Commons Citation
Stanescu, Tudor D.; Stitek, Anna; and Manolescu, Andrei, "Robust topological phase in proximitized core–shell nanowires coupled to multiple superconductors" (2018). Faculty & Staff Scholarship. 1625.
Stanescu, T. D., Sitek, A., & Manolescu, A. (2018). Robust topological phase in proximitized core–shell nanowires coupled to multiple superconductors. Beilstein Journal of Nanotechnology, 9, 1512–1526. https://doi.org/10.3762/bjnano.9.142