Gate-tunable Superconductivity in Hybrid InSb-Pb Nanowires

TL;DR

This paper reports on hybrid InSb-Pb nanowires exhibiting high-quality superconducting gaps, gate-tunability, and promising features for quantum transport applications, combining high spin-orbit coupling with robust superconductivity.

Contribution

It demonstrates the fabrication and characterization of high-quality InSb-Pb nanowires with tunable superconducting properties and high critical fields, advancing hybrid quantum device development.

Findings

Hard induced superconducting gaps observed

Gate-tunable supercurrent demonstrated

High crystal quality of Pb layer confirmed

Abstract

We present a report on hybrid InSb-Pb nanowires that combine high spin-orbit coupling with a high critical field and a large superconducting gap. Material characterization indicates the Pb layer of high crystal quality on the nanowire side facets. Hard induced superconducting gaps and gate-tunable supercurrent are observed in the hybrid nanowires. These results showcase the promising potential of this material combination for a diverse range of applications in hybrid quantum transport devices.