Decoupling of epitaxial graphene via gold intercalation probed by dispersive Raman spectroscopy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00455736" target="_blank" >RIV/68378271:_____/15:00455736 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1063/1.4920931" target="_blank" >http://dx.doi.org/10.1063/1.4920931</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.4920931" target="_blank" >10.1063/1.4920931</a>
Alternative languages
Result language
angličtina
Original language name
Decoupling of epitaxial graphene via gold intercalation probed by dispersive Raman spectroscopy
Original language description
Signatures of a superlattice structure composed of a quasi periodic arrangement of atomic gold clusters below an epitaxied graphene (EG) layer are examined using dispersive Raman spectroscopy. The gold-graphene system exhibits a laser excitation energy dependant red shift of the 2D mode as compared to pristine epitaxial graphene. The phonon dispersions in both the systems are mapped using the experimentally observed Raman signatures and a third-nearest neighbour tight binding electronic band structure model. Our results reveal that the observed excitation dependent Raman red shift in gold EG primarily arise from the modifications of the phonon dispersion in gold-graphene and shows that the extent of decoupling of graphene from the underlying SiC substrate can be monitored from the dispersive nature of the Raman 2D modes. The intercalated gold atoms restore the phonon band structure of epitaxial graphene towards free standing graphene.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Applied Physics
ISSN
0021-8979
e-ISSN
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Volume of the periodical
117
Issue of the periodical within the volume
18
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
"183103-1"-"183103-8"
UT code for WoS article
000354984500003
EID of the result in the Scopus database
2-s2.0-84929346881