Two-dimensional (2D) Dirac materials have attracted intense research efforts due to their promise for applications ranging from field-effect transistors and low-power electronics to fault-tolerant quantum computation. One key challenge is to fabricate 2D Dirac materials hosting Dirac electrons. Here, monolayer germanene is successfully fabricated on a Ag2Ge surface alloy. Scanning tunneling spectroscopy measurements revealed a linear energy dispersion relation. The latter was supported by density functional theory calculations. These results demonstrate that monolayer germanene can be realistically fabricated on a Ag2Ge surface alloy. The finding opens the door to exploration and study of 2D Dirac material physics and device applications.
@article{arxiv.2308.12878,
title = {Two-dimensional germanium islands with Dirac signature on Ag2Ge surface alloy},
author = {Jiaqi Deng and Gulnigar Ablat and Yumu Yang and Xiaoshuai Fu and Qilong Wu and Ping Li and Li Zhang and Ali Safaei and Lijie Zhang and Zhihui Qin},
journal= {arXiv preprint arXiv:2308.12878},
year = {2023}
}