upward

Phase diagram

R Paul, S X Hu, V V Karasiev, Anharmonic and Anomalous Trends in the High-Pressure Phase Diagram of Silicon, PRL 122, 125701 (2019)

C Li, C Wang, J Han, L Yan, B Deng, X Liu, A comprehensive study of the high-pressure-temperature phase diagram of silicon, J Mater Sci 53, 7475 (2018)