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Impurity-induced triple point fermions in twisted bilayer graphene
(Amer Physical Soc, 2019-06-10)
Triple point fermions are elusive electronic excitations that generalize Dirac and Weyl modes beyond the conventional high-energy paradigm. Yet, finding real materials naturally hosting these excitations at the Fermi energy ...
Controlled rippling of graphene: Via irradiation and applied strain modify its mechanical properties: A nanoindentation simulation study
(Royal Society of Chemistry, 2016-01)
Ripples present in free standing graphene have an important influence on the mechanical behavior of this two-dimensional material. In this study, we show through nanoindentation simulations, how out-of-plane displacements ...
Noncovalent functionalization of carbon nanotubes and graphene with tetraphenylporphyrins: stability and optical properties from ab initio calculations
(Journal of Materials Science, 2014-11)
The stability, electronic, and optical properties of single-walled carbon nanotubes (CNTs) and graphene non-covalently functionalized with free-base tetraphenylporphyrin (TPP) molecules is addressed by density functional ...
Plasma-assisted molecular beam epitaxy of GaN nanowires on epitaxial single-layer graphene
(Spie-int Soc Optical Engineering, 2018-01-01)
We investigate the formation of GaN nanowires in plasma-assisted molecular beam epitaxy on epitaxial graphene prepared on SiC(0001) using the surface graphitization method in an inductively heated furnace. The pristine ...
Optical properties of graphene nanocones under electric and magnetic fields
(2017)
Here we present a theoretical study of the optical properties of graphene nanocones tuned by external electric and magnetic fields. We investigate the effects of the size and topology of the carbon nanostructures on the ...
Induced fractional valley number in graphene with topological defects
(Amer Physical Soc, 2015)
Induced fractional valley number in graphene with topological defects
(Amer Physical Soc, 2015)
Camadas de heteroestruturas hexagonais planas modeladas por grafos quânticos
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Matemática - PPGMCâmpus São Carlos, 2022-08-24)
We started this work by reviewing an application of periodic quantum graph theory to model monolayer hexagonal materials with δ_a and δ_b parameters associated with the different types of atoms located in their vertices. ...