@article{Johnson2019, 
author = {Virginia L. Johnson and Auddy Anilao and Kristie J. Koski},
title = {Pressure-dependent phase transition of 2D layered silicon telluride (Si2Te3) and manganese intercalated silicon telluride},
year = {2019},
journal = {Nano Research},
volume = {12},
number = {9},
pages = {2373-2377},
keywords = {high pressure, silicon telluride, Si2Te3, diamond anvil cell, two-dimensional (2D) layered material},
url = {https://www.sciopen.com/article/10.1007/s12274-019-2387-7},
doi = {10.1007/s12274-019-2387-7},
abstract = {Two-dimensional (2D) layered silicon telluride (Si2Te3) nanocrystals were compressed to 12 GPa using diamond anvil cell techniques. Optical measurements show a color change from transparent red to opaque black indicating a semiconductor-to-metal phase transition. Raman scattering was used to observe the stiffening of the crystal lattice and subsequent phase behavior. A possible phase transition was observed at 9.5 ± 0.5 GPa evidenced by the disappearance of the A1g stretching mode. Si2Te3 was intercalated with elemental manganese to ~ 1 at.%. Intercalation lowers the pressure of the proposed phase transition to 7.5 ± 1 GPa. Raman modes show both phonon stiffening and phonon softening, suggesting negative linear compressibility. These results provide fundamental insight into the high-pressure optical phonon behavior of silicon telluride and illuminate how a specific electron-donating intercalant can chemically alter pressure-dependent optical phonon behavior.}
}