Open AccessTHE ELECTRONIC STRUCTURE AND MAGNETIC PROPERTIES OF THE CHIRAL TOROIDAL CARBON NANOTUBES
Author(s) -
Zhenhua Zhang,
Jie Peng,
Xiaohua Chen,
Hua Zhang
Publication year - 2001
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.50.1150
Subject(s) - carbon nanotube , toroid , materials science , electronic structure , carbon nanobud , condensed matter physics , nanotechnology , optical properties of carbon nanotubes , nanotube , physics , plasma , quantum mechanics
Based on the tight-binding model of π electrons for a graphite sheet, the electronic structure of the chiral toroidal carbon nanotubes(TCNTs) has been derived.The quantum properties and magnetic pattern of TCNTs have been investigated in detail in this paper. A magnetic field can induce a metal-semiconductor transition for typeⅠ and Ⅱ TCNTs.The computation and analysis also show: when- T=0K, the magnetism of typeⅠand Ⅱ TCNTs are a linearly function of the magnetic flux Φ, with a period Φ0(h/e),which is sensitive to chiral angle θ,toroidal width r and temperture T, independent of toroidal radius R. The magnetism of chiral TCNTs is much stronger than that of the armchair or zigzag TCNTs. The magnetism of type Ⅲ TCNTs is very weak,without regularity.