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Ambipolar charge transport in quasi-free-standing monolayer graphene on SiC obtained by gold intercalation
- Source :
- Phys. Rev. B 102, 165403 (2020)
- Publication Year :
- 2020
-
Abstract
- We present a study of quasi-free-standing monolayer graphene obtained by intercalation of Au atoms at the interface between the carbon buffer layer (Bu-L) and the silicon-terminated face (0001) of 4H-silicon carbide. Au intercalation is achieved by deposition of atomically thin Au on the Bu-L followed by annealing at 850 {\deg}C in an Argon atmosphere. We explore the intercalation of Au and decoupling of the Bu-L into quasi-free-standing monolayer graphene by surface science characterizations and electron transport in top-gated electronic devices. By gate-dependent magnetotransport we find that the Au-intercalated buffer layer displays all properties of monolayer graphene, namely gate tunable ambipolar transport across the Dirac point, and n- or p-type doping depending on the Au content.
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 102, 165403 (2020)
- Publication Type :
- Report
- Accession number :
- edsarx.2004.01692
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.102.165403