A theoretical study on silicon and III-V compound nanotubes

Date
2005
Advisor
Instructor
Source Title
Turkish Journal of Physics
Print ISSN
1300-0101
Electronic ISSN
Publisher
TÜBİTAK
Volume
29
Issue
5
Pages
307 - 318
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
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.

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Book Title
Keywords
First principles calculations, Nanotube, Silicon, Deformation, Molecular dynamics, Nanotubes, Probability density function, Semiconducting gallium arsenide, Electronic analysis, First principles calculation, Single-wall silicon, Silicon
Citation
Published Version (Please cite this version)