A possible scenario of metallization in boron doped diamond CB$_x$

TL;DR

This paper explores the potential for boron-doped diamond to become metallic through acceptor state collectivization, using a generalized Anderson s-d hybrid model to explain experimental observations of metallization and superconductivity.

Contribution

It introduces a generalized model for multicomponent band structures and impurity pairs to describe metallization in boron-doped diamond.

Findings

Parameters of the band structure align with experimental data.

The model explains the transition to metallic and superconducting states.

Impurity pairs play a key role in the metallization process.

Abstract

Possibility for collectivization of acceptor states in a semiconductor, converting it to metal, is discussed within the scope of Anderson s-d hybride model. This model is generalized for multicomponent band structure and composite acceptor states, localized on pairs of neighbor dopants (impurity "dumbbells"), in order to describe boron doped diamond CB$_x$. The resulting parameters of band structure, in particular, position of the Fermi level, are compared to the recent experimental data on metallized and superconducting CB$_x$.