Suspended InAs nanowire Josephson junctions assembled via dielectrophoresis

TL;DR

This paper introduces a new method for creating suspended InAs nanowire Josephson junctions using dielectrophoresis, reducing substrate interactions and potentially improving device performance.

Contribution

The authors develop a dielectrophoresis-guided assembly technique for suspended nanowire Josephson junctions, enabling precise alignment and substrate interaction removal.

Findings

Successful fabrication of suspended InAs nanowire Josephson junctions.

Reduced substrate influence on nanowire properties.

Discussion on potential applications with high-temperature superconductors.

Abstract

We present a novel technique for the realization of suspended Josephson junctions based on InAs semiconductor nanowires. The devices are assembled using a technique of drop-casting guided by dielectrophoresis that allows to finely align the nanostructures on top of the electrodes. The proposed architecture removes the interaction between the nanowire and the substrate which is known to influence disorder and the orientation of the Rashba vector. The relevance of this approach in view of the implementation of Josephson junctions based on High-Temperature Superconductors is discussed.