Hybrid InAs nanowire-vanadium proximity SQUID

TL;DR

This paper presents the development of InAs nanowire-based SQUIDs with vanadium electrodes, demonstrating robust operation up to 2.5 K, high magnetic-field modulation, and potential for quantum circuit integration.

Contribution

The work introduces a novel hybrid InAs nanowire-vanadium SQUID fabrication with enhanced thermal stability and magnetic response, suitable for quantum applications.

Findings

Operates up to ~2.5 K with reduced power dissipation

Exhibits nearly-symmetric geometry with large magnetic-field modulation

Shows robustness against thermal cycling

Abstract

We report the fabrication and characterization of superconducting quantum interference devices (SQUIDs) based on InAs nanowires and vanadium superconducting electrodes. These mesoscopic devices are found to be extremely robust against thermal cycling and to operate up to temperatures of $\sim2.5$~K with reduced power dissipation. We show that our geometry allows to obtain nearly-symmetric devices with very large magnetic-field modulation of the critical current. All these properties make these devices attractive for on-chip quantum-circuit implementation.