Lindeman's criterion: diamond graphitization temperature and its dependence on external pressure

TL;DR

This paper proposes a simple model for diamond graphitization, accurately predicting the phase transition temperature's dependence on external pressure and forecasting a novel phenomenon where increased pressure lowers the graphitization temperature.

Contribution

It introduces a new model for diamond graphitization that aligns well with experimental data and predicts a previously unreported pressure-dependent decrease in transition temperature.

Findings

Phase transition temperature depends on external pressure.

A decrease in graphitization temperature with increasing pressure is predicted.

Model shows good agreement with experimental data.

Abstract

A simple model for the "diamond graphitization" type of phase transition is proposed, leading to a good agreement with the experimental data. The phase transition temperature dependence on the external pressure is found. A new phenomenon in diamond is predicted, which is a decrease of the temperature of graphitization with increase of external pressure.