Hybrid semiconductor-superconductor nanowires have emerged as a promising platform for realizing topological superconductivity (TSC). Here, we present a route to TSC using magnetic flux applied to a full superconducting shell surrounding a semiconducting nanowire core. Tunneling into the core reveals a hard induced gap near zero applied flux, corresponding to zero phase winding, and a gapped region with a discrete zero-energy state around one applied flux quantum, corresponding to 2p phase winding. Theoretical analysis indicates that the winding of the superconducting phase can induce a transition to a topological phase supporting Majorana zero modes. Measured Coulomb blockade peak spacing around one flux quantum shows a length dependence that is consistent with the existence of Majorana modes at the ends of the nanowire.

Flux-induced topological superconductivity in full-shell nanowires / Vaitiekėnas, S; Winkler, G W; van Heck, B; Karzig, T; Deng, M-T; Flensberg, K; Glazman, L I; Nayak, C; Krogstrup, P; Lutchyn, R M; Marcus, C M. - In: SCIENCE. - ISSN 0036-8075. - 367:6485(2020). [10.1126/science.aav3392]

Flux-induced topological superconductivity in full-shell nanowires

van Heck, B;
2020

Abstract

Hybrid semiconductor-superconductor nanowires have emerged as a promising platform for realizing topological superconductivity (TSC). Here, we present a route to TSC using magnetic flux applied to a full superconducting shell surrounding a semiconducting nanowire core. Tunneling into the core reveals a hard induced gap near zero applied flux, corresponding to zero phase winding, and a gapped region with a discrete zero-energy state around one applied flux quantum, corresponding to 2p phase winding. Theoretical analysis indicates that the winding of the superconducting phase can induce a transition to a topological phase supporting Majorana zero modes. Measured Coulomb blockade peak spacing around one flux quantum shows a length dependence that is consistent with the existence of Majorana modes at the ends of the nanowire.
2020
topological;superconductivity;full-shell
01 Pubblicazione su rivista::01a Articolo in rivista
Flux-induced topological superconductivity in full-shell nanowires / Vaitiekėnas, S; Winkler, G W; van Heck, B; Karzig, T; Deng, M-T; Flensberg, K; Glazman, L I; Nayak, C; Krogstrup, P; Lutchyn, R M; Marcus, C M. - In: SCIENCE. - ISSN 0036-8075. - 367:6485(2020). [10.1126/science.aav3392]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1655998
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