# Understanding the nature of "superhard graphite"

Source: [Understanding the nature of "superhard graphite"](<https://www.sota2.com/research/paper/68fa2b661e209131ce846bde>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-28T13:53:13.855Z

Authors: Salah Eddine Boulfelfel, Artem R. Oganov, Stefano Leoni

Published: 2012-04-20T21:33:38.000Z

## Abstract

Numerous experiments showed that on cold compression graphite transforms into a new superhard and transparent allotrope. Several structures with different topologies have been proposed for this phase. While experimental data are consistent with these models, the only way to solve this puzzle is to find which structure is kinetically easiest to form. Using state-of-the-art molecular-dynamics transition path sampling simulations, we investigate kinetic pathways of the pressure-induced transformation of graphite to various superhard candidate structures. Unlike hitherto applied methods for elucidating nature of superhard graphite, transition path sampling realistically models nucleation events necessary for physically meaningful transformation kinetics. We demonstrate that nucleation mechanism and kinetics lead to $M$-carbon as the final product. $W$-carbon, initially competitor to $M$-carbon, is ruled out by phase growth. Bct-C$\_4$ structure is not expected to be produced by cold compression due to less probable nucleation and higher barrier of formation.

## Recorded benchmark results

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1204.4750>)

[PDF](<https://arxiv.org/pdf/1204.4750.pdf>)