Nanostructures made from superconducting boron doped diamond

TL;DR

This paper investigates the transport properties of nanostructures made from boron-doped superconducting diamond, demonstrating preserved superconductivity at nanometer scales with high critical temperatures and fields.

Contribution

It presents a method to fabricate nanostructures from boron-doped diamond and characterizes their superconducting properties at the nanoscale, showing maintained superconductivity.

Findings

Superconducting boron-doped diamond nanostructures retain properties at sub-100 nm widths.

Critical temperatures are in the Kelvin range for small devices.

Critical magnetic fields reach Tesla levels.

Abstract

We report on the transport properties of nanostructures made from boron-doped superconducting diamond. Starting from nanocrystalline superconducting boron-doped diamond thin films, grown by Chemical Vapor Deposition, we pattern by electron-beam lithography devices with dimensions in the nanometer range. We show that even for such small devices, the superconducting properties of the material are well preserved: for wires of width less than $100\, nm$, we measure critical temperatures in the Kelvin range and critical field in the Tesla range.