Studies of Li intercalation into epitaxial graphene on SiC(0001)
2012 (English)In: Materials Science Forum Vols 717 - 720, Trans Tech Publications Inc., 2012, Vol. 717-720, 653-656 p.Conference paper (Refereed)
Detailed studies of Li deposition on monolayer graphene grown on the Si-face SiCsurface were performed using LEEM, μ-LEED, PES and ARPES. Li was found to intercalatedirectly after the deposition at room temperature. However, excess Li was also observed on thesurface and found to form a compound with carbon atoms. This compound is suggested to give riseto a new (√3x√3) R30° surface reconstruction. After annealing the (√3x√3) R30° reconstructionvanished and only a (1x1) graphene diffraction pattern was visible. At the same time a severechange was observed in the graphene morphology, especially from the ex-situ grown graphene, i.e.,extended areas of cracks/wrinkles were observed. These wrinkles/cracks did not disappear evenafter heating at temperature of 500-1000°C when no Li signal was detected.
Place, publisher, year, edition, pages
Trans Tech Publications Inc., 2012. Vol. 717-720, 653-656 p.
graphene, intercalation, functionalization, doping, electronic structure
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-78695DOI: 10.4028/www.scientific.net/MSF.717-720.653ISI: 000309431000156OAI: oai:DiVA.org:liu-78695DiVA: diva2:534769
The 2011 International Conference on Silicon Carbide and Related Materials (ICSCRM 2011), September 11 – 16, 2011, Cleveland, Ohio, USA