TITLE

Surface intercalation of gold underneath a graphene monolayer on SiC(0001) studied by scanning tunneling microscopy and spectroscopy

AUTHOR(S)
Premlal, B.; Cranney, M.; Vonau, F.; Aubel, D.; Casterman, D.; De Souza, M. M.; Simon, L.
PUB. DATE
June 2009
SOURCE
Applied Physics Letters;6/29/2009, Vol. 94 Issue 26, p263115
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The effects of gold deposition on monolayer graphene (MG) epitaxied on SiC (0001) substrate are examined via scanning tunneling microscopy and scanning tunneling spectroscopy (STS). Two types of surfaces with distinctive topography are demonstrated: (i) intercalated gold clusters having no interaction with graphene and (ii) 13×13-G reconstruction attributed to a Moiré pattern arising from the intercalation of 1 ML of gold between a MG and the underlying SiC substrate. This surface also displays a 23×23R30-Au (111) surface reconstruction interpreted as surface corrugation. The STS curve shows a possible hole-doping effect in the latter case.
ACCESSION #
42961907

 

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