Mechanism of superconductivity in diamond

Determine the microscopic mechanism responsible for superconductivity in diamond, establishing the nature of the pairing interaction and the physical processes that produce the superconducting state in diamond materials.

Background

The paper discusses superconductivity in carbon-based materials and notes long-standing debates and uncertainties specific to diamond. While polycrystalline boron-doped diamond has shown superconductivity, the fundamental mechanism underlying superconductivity in diamond remains unresolved. This uncertainty motivates the reported experiments on heavily boron- and nitrogen-co-doped single-crystal diamond and related heterostructures.

The authors present experimental observations of superconductivity and metallic behavior, and speculate about possible roles of phonons and excitons, but they do not claim a definitive mechanism. This problem remains foundational for interpreting their results and for advancing diamond-based superconducting technologies.