NDLI: Cluster modeling of three types of double-walled armchair silicon carbide nanotubes

Content Provider	Springer Nature Link
Author	Adhikari, K. Ray, A. K.
Copyright Year	2011
Abstract	A systematic study of three types of armchair double-walled SiC nanotubes (DWNT) (n,n)@(m,m) (3 ≤ n ≤ 6; 7 ≤ m ≤ 12) using the finite cluster approximation is presented. The geometries of the tubes have been spin optimized using the hybrid functional B3LYP (Becke’s three-parameter exchange functional and the Lee-Yang-Parr correlation functional) and the all electron 3-21G* basis set. The study indicates that the stabilities of the double-walled SiC nanotubes are of the same order as those of single-walled SiC nanotubes suggesting the possibility of experimental synthesis of both single-walled and double-walled SiC nanotubes. The binding energy per atom or the cohesive energy of the double-walled nanotubes depends not only on the number of atoms but also on the coupling of the constituent singlewalled nanotubes and their types. A study of the binding energies, Mulliken charges, density of states and HOMO-LUMO gaps has been performed for all nanotubes from (n,n)@(n + 3,n + 3) to (n,n)@(n + 6,n + 6) (n = 3 − 6). Type 2 DWNTs do not preserve the coaxial geometry when the difference in the chirality of the outer and inner tubes is 5 or less. For type 3, this occurs when the chirality difference is 4 or less. The gaps of types 2 and 3 DWNTs are lower than those of the corresponding single-walled nanotubes and are significantly less than those of type 1 DWNTs.
Starting Page	353
Ending Page	363
Page Count	11
File Format	PDF
ISSN	14346060
Journal	The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
Volume Number	64
Issue Number	2-3
e-ISSN	14346079
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-10-11
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nonlinear Dynamics Spectroscopy/Spectrometry Quantum Physics Quantum Information Technology, Spintronics Atomic, Molecular, Optical and Plasma Physics Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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