@article{Bai2010, 
author = {Jaeil Bai and Hideki Tanaka and Xiao Cheng Zeng},
title = {Graphene-Like Bilayer Hexagonal Silicon Polymorph},
year = {2010},
journal = {Nano Research},
volume = {3},
number = {10},
pages = {694-700},
keywords = {Bilayer hexagonal silicon, slit pore, semimetal, two-dimensional polymorph},
url = {https://www.sciopen.com/article/10.1007/s12274-010-0032-6},
doi = {10.1007/s12274-010-0032-6},
abstract = {We present molecular dynamics simulation evidence for a freezing transition from liquid silicon to quasi-two-dimensional (quasi-2D) bilayer silicon in a slit nanopore. This new quasi-2D polymorph of silicon exhibits a bilayer hexagonal structure in which the covalent coordination number of every silicon atom is four. Quantum molecular dynamics simulations show that the stand-alone bilayer silicon (without the confinement) is still stable at 400 K. Electronic band-structure calculations suggest that the bilayer hexagonal silicon is a quasi-2D semimetal, similar to a graphene monolayer, but with an indirect zero band gap.}
}