  The shock strength dependent formation of diamond represents one of the most
intriguing questions in graphite research. Using ab initio DFT-trained carbon
GNN model, we observe a strength-dependent graphite transition under shock. The
poor sliding caused by scarce sliding time under high-strength shock forms
hexagonal diamond with an orientation of (001)G//(100)HD+[010]G//[010]HD; under
low-strength shock, cubic diamond forms after enough sliding time, unveiling
the strength-dependent graphite transition. We provide computational evidence
of the strength-dependent graphite transition from first principles, clarifying
the long-term shock-induced hexagonal formation and structural
strength-dependent trend source.
