Journal
MATERIALS RESEARCH EXPRESS
Volume 5, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/aaa862
Keywords
graphene hybrids; ab initio calculations; electronic properties; Bethe Salpeter equation; optical properties; excitonic effects
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Funding
- Centre National pour la Recherche Scientifique et Technique (CNRST)-Morocco
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This work investigates optoelectronic properties of SiC- and GeC-hybrids that are still unexplored. Using DFT and many body effect calculations, we study, among others, charge density, dielectric functions, reflectivity and electron energy loss spectroscopy. The charge transfer determines the bonds nature between the atoms constituting the hybrids. A comparative study of gap and binding energy using different approximations is presented. The dielectric functions reveal strong excitonic effects. Two peaks related to p and p+s electron plasmons are observed in the spectra of loss energy. Moreover, the analysis of reflectivity shows that hybrids are transparent in the visible region. Other interesting findings are also detailed.
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