Electronic and Magnetic Properties of Partially-Open Carbon Nanotubes

Abstract

On the basis of the spin-polarized density functional theory calculations, we demonstrate that partially-open carbon nanotubes (CNTs) observed in recent experiments have rich electronic and magnetic properties which depend on the degree of the opening. A partially-open armchair CNT is converted from a metal to a semiconductor, and then to a spin-polarized semiconductor by increasing the length of the opening on the wall. Spin-polarized states become increasingly more stable than nonmagnetic states as the length of the opening is further increased. In addition, external electric fields or chemical modifications are usable to control the electronic and magnetic properties of the system. We show that half-metallicity may be achieved and the spin current may be controlled by external electric fields or by asymmetric functionalization of the edges of the opening. Our findings suggest that partially-open CNTs may offer unique opportunities for the future development of nanoscale electronics and spintronics.

6 figures, to appear in J. Am. Chem. Soc

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Cited by in corpus (5)

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• The Origin of Half-Metallicity in Conjugated Electron System -- a Study on Transition Metal Doped Graphyne
• Multiple Localized States and Magnetic Orderings in Partially Open Zigzag Carbon Nanotube Superlattices: An Ab Initio Study
• Universal Scaling of Electron Transmission for Nearly Ballistic and Quantum Dragon Nanodevices
• Molecular adsorption study of nicotine and caffeine on the single-walled carbon nanotube from first principles