Low Temperature Physics: 42, 421 (2016); https://doi.org/10.1063/1.4951667
Fizika Nizkikh Temperatur: Volume 42, Number 5 (May 2016), p. 538-543    ( to contents , go back )

Incapsulation of “armchair”-type nanotubes by the “zigzag” Fe atoms chains

V.G. Boutko, A.A. Gusev, T.N. Shevtsova, and Yu.G. Pashkevich

O.O. Galkin Donetsk Institute for Physics and Engineering NAS of Ukraine, Kyiv 03680, Ukraine
E-mail: shev@fti.dn.ua
pos Анотація:

Received December 14, 2015

Abstract

Аb initio calculations of structural, electronic and magnetic properties of “chair” carbon nanotubes Fe2@(n,n)m (m = 1, 2; n = 4, 5, 6, 7, 8, 9) (NT) encapsulated by zigzag Fe atom chain were performed in the density functional theory framework. It is shown, that the structural optimization along NT axis may essentially change the binding energy of NT and Fe atom chain. It follows from calculations, that Fe2@(5,5) is the most stable among all investigated encapsulated nanotubes. Reducing the Fe concentration in encapsulated NT in two time converts system from exothermic to endothermic one (Fe2@(5,5)m) and vice versa (Fe2@(6,6)m)). At the large radii of encapsulated NT (> 4,13 Å) the binding energy of NT and Fe atom chain tends to zero, also the Fe atoms magnetic moments and Fe atom deviations from NT axis tends to similar values for free zigzag Fe atom chain.

PACS: 71.20.Tx Fullerenes and related materials; intercalation compounds;
PACS: 73.22.–f Electronic structure of nanoscale materials and related systems;
PACS: 61.48.De Structure of carbon nanotubes, boron nanotubes, and other related systems.

Key words: electronic structures, carbon nanotube “armchair”, encapsulation, “zigzag” Fe atom chain, binding energy, magnetic moment of Fe.

Published online: March 23, 2016

Download 494907 byte View Contents