Journal
NANO LETTERS
Volume 19, Issue 3, Pages 1520-1526Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b04207
Keywords
Germanane; multilayer germanene; dehydrogenation; metallic state; weak antilocalization; strong spin-orbit interaction
Categories
Funding
- Ubbo Emmius Fund [FV157]
- FlagERA iSpinText
- European Research Council [648855]
- European Research Council (ERC) [648855] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
Similar to carbon, germanium exists in various structures such as three-dimensional crystalline germanium and germanene, a two-dimensional germanium atomic layer. Regarding the electronic properties, they are either semiconductors or Dirac semimetals. Here, we report a highly conductive metallic state in thermally annealed germanane (hydrogen-terminated germanene, GeH), which shows a resistivity of similar to 10(-7) Omega.m that is orders of magnitude lower than any other allotrope of germanium. By comparing the resistivity, Raman spectra, and thickness change measured by AFM, we suggest the highly conductive metallic state is associated with the dehydrogenation during heating, which likely transforms germanane thin flakes to multilayer germanene. In addition, weak antilocalization is observed, serving as solid evidence for strong spin-orbit interaction (SOI) in germanane/germanene. Our study opens a possible new route to investigate the electrical transport properties of germanane/germanene, and the large SOI might provide the essential ingredients to access their topological states predicted theoretically.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available