Superconducting and Normal State Properties of Heavily Hole-Doped Diamond

TL;DR

This study investigates the superconducting and normal state properties of heavily hole-doped diamond, providing evidence for bulk superconductivity and supporting a conventional electron-phonon pairing mechanism.

Contribution

It presents comprehensive measurements on B-doped diamond, establishing bulk superconductivity and characterizing its fundamental properties for the first time.

Findings

Evidence of bulk superconductivity in heavily B-doped diamond

Materials parameters favor a weak coupling electron-phonon mechanism

Consistent data supporting conventional superconductivity

Abstract

We report measurements of the specific heat, Hall effect, upper critical field and resistivity on bulk, B-doped diamond prepared by reacting amorphous B and graphite under high-pressure/high-temperature conditions. These experiments establish unambiguous evidence for bulk superconductivity and provide a consistent set of materials parameters that favor a conventional, weak coupling electron-phonon interpretation of the superconducting mechanism at high hole doping.