Concepedia

Electronic structure of silicon-based nanostructures

Physical Review B · 2007 · 1K citations · 28 references

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TL;DR

Mechanism: lines with [Mechanism] are two: "We considered the $s{p}^{3}{s}^{*}$ and $s{p}^{3}$ models up to first- and second-nearest neighbors, respectively." and "Comparison to a recent ab initio calculation is made." Combine into one sentence: "The study employs $s p^3 s^*$ and $s p^3$ tight‑binding models up to first‑ and second‑nearest neighbors and compares the results to recent ab initio calculations." That covers. Findings: multiple lines: first: "We have developed a 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." second: "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." Also the other lines about references are part of Findings? Actually the [Findings] lines include the reference lines: "[Other] Rev.

Abstract

We have developed a 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 $s{p}^{3}{s}^{*}$ and $s{p}^{3}$ 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 [Phys. Rev. Lett. 68, 1579 (1992)] rule. Comparison to a recent ab initio calculation is made.