A theoretical study on silicon and III-V compound nanotubes
Date
2005Source Title
Turkish Journal of Physics
Print ISSN
1300-0101
Publisher
TÜBİTAK
Volume
29
Issue
5
Pages
307 - 318
Language
English
Type
ArticleItem Usage Stats
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Abstract
In this paper we present a theoretical study on single-wall silicon and III-V compound nanotubes. First principles plane wave calculations within density functional theory are used to predict energetics and electronic structures of armchair and zigzag nanotubes. The stability of tubular structures is further investigated at finite temperature by ab initio molecular dynamics calculations. Our results indicate that (n,0) zigzag and (n,n) armchair single-wall Si nanotubes are stable for n ≥ 6. Mechanically, the Si nanotubes are radially soft, however they are strong against axial deformations. Electronic analysis showed that zigzag nanotubes are metallic for n ≤ 11, but they show semiconducting behavior for larger radii. On the other hand, all armchair nanotubes are metallic. (8,0) single wall nanotube has been chosen as prototypes for AlP, GaN, and GaAs compounds and we found that they are semiconducting and stable at room temperature. © TÜBİTAK.
Keywords
First principles calculationsNanotube
Silicon
Deformation
Molecular dynamics
Nanotubes
Probability density function
Semiconducting gallium arsenide
Electronic analysis
First principles calculation
Single-wall silicon
Silicon