Studies of Li Intercalation into Epitaxial Graphene on SiC(0001)

Abstract:

Detailed studies of Li deposition on monolayer graphene grown on the Si-face SiC surface were performed using LEEM, µ- LEED, PES and ARPES. Li found to intercalate directly after the deposition at room temperature. However, excess Li was also observed on the surface and found to form a compound with carbon atoms. This compound is suggested to give rise to a new (√3x√3) R30° surface reconstruction. After annealing the (√3x√3) R30° reconstruction was vanished and only a (1x1) graphene diffraction pattern was visible. At the same time a sever change was observed on the graphene morphology, especially from the ex-situ grown graphene, i.e. extended area of cracks/wrinkles were observed. These wrinkles/cracks did not disappear even after heating at temperature of 500-1000°C when no Li signal was detected.

• Periodical: Materials Science Forum (Volumes 717-720)
• Pages: 653-656
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.717-720.653
• Online since: May 2012
• Authors: Chariya Virojanadara, S. Watcharinyanon, A. A. Zakharov, R. Yakimova, Leif I. Johansson
• Keywords: Doping, Electronic Structure, Functionalization, Graphen, Intercalation

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