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Description:

We show ballistic superconductivity in InSb semiconductor nanowires. Our structural and chemical analyses demonstrate a high-quality interface between the nanowire and a NbTiN superconductor. The high-quality interface enables ballistic transport manifested by a quantized conductance for normal carriers, and a strong enhancement of conductance resulting from Andreev reflection. Gate tuning the device to a tunnel probe reveals an induced hard-gap with a significantly reduced subgap density of states, corroborating the homogeneity of our hybrid interface. These results constitute a substantial improvement in induced superconductivity in semiconductors, and pave the way for disorder-free Majorana devices.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: emiconductor nanowires, superconductivity, Majorana mode

Date published: 2017-07-06

Publisher: Springer Science and Business Media LLC

Journal:

• Nature Communications (ISSN: 20411723) vol. 8 16025

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1038/ncomms16025

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Updated at: 2025-02-28 08:30:29 +0900

Published on MDR: 2025-02-28 08:30:29 +0900