Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-06-30
Phys. Rev. B 76, 075131 (2007)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages, 6 Figures
Scientific paper
10.1103/PhysRevB.76.075131
We have developed an unifying tight-binding Hamiltonian that can account for the electronic properties of recently proposed Si-based nanostructures, namely, Si graphene-like sheets and Si nanotubes. We considered the $sp^3s^*$ and $sp^{3}$ models up to first- and second-nearest neighbors, respectively. Our results show that the Si graphene-like sheets considered here are metals or zero-gap semiconductors, and that the corresponding Si nanotubes follow the so-called Hamada's rule [Phys. Rev. Lett. {\bf 68}, 1579 1992]. Comparison to a recent {\it ab initio} calculation is made.
Guzmán-Verri G. G.
Yan Voon C. Lew L.
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