Compression-induced phase transitions in supercooled liquid and glassy confined germanene

Compression-induced phase transitions in supercooled liquid and glassy confined germanene are studied via molecular dynamics (MD) simulations. Glassy state is obtained by cooling from the melt to 300 K under zero pressure. Then, some selected atomic configurations at temperatures above and below Tg\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${T}_{g}$$\end{document} are taken as initial supercooled liquid or glassy two-dimensional (2D) models for the isothermal compression from low-density to high-density states in order to study compression-induced phase transitions in the models. We find formation of the triangular-hexa (trh) germanene as the most stable state in the high-density region. Moreover, we find the compression-induced amorphization of supercooled liquid and amorphous-amorphous phase transitions in the system.