# Proximity Induced Superconductivity in CdTe-HgTe Core-Shell Nanowires

## TL;DR

This paper reports the induction of superconductivity in CdTe-HgTe core-shell nanowires, demonstrating Josephson supercurrent and high-quality interfaces, advancing potential applications in topological quantum devices.

## Contribution

It presents the first observation of proximity-induced superconductivity in CdTe-HgTe nanowires with detailed transport characteristics.

## Key findings

- Demonstration of Josephson supercurrent in nanowires
- Observation of a sizable $I_c R_n$ product and positive excess current
- Detection of multiple Andreev reflections up to fourth order

## Abstract

In this letter we report on proximity superconductivity induced in CdTe-HgTe core-shell nanowires, a quasi-one-dimensional heterostructure of the topological insulator HgTe. We demonstrate a Josephson supercurrent in our nanowires contacted with superconducting Al leads. The observation of a sizable $I_c R_n$ product, a positive excess current and multiple Andreev reflections up to fourth order further indicate a high interface quality of the junctions.