Two-dimensional germanium islands with Dirac signature on Ag2Ge surface alloy
- Resource Type
- Working Paper
- Authors
- Deng, Jiaqi; Ablat, Gulnigar; Yang, Yumu; Fu, Xiaoshuai; Wu, Qilong; Li, Ping; Zhang, Li; Safaei, Ali; Zhang, Lijie; Qin, Zhihui
- Source
- J. Phys.: Condens. Matter 33 (2021) 225001 (7pp)
- Subject
- Condensed Matter - Materials Science
Condensed Matter - Mesoscale and Nanoscale Physics
- Language
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.