Structural, electronic and magnetic properties of vacancies in single-walled carbon nanotubes
Author | dc.contributor.author | Orellana, W. | |
Author | dc.contributor.author | Fuentealba Rosas, Patricio | es_CL |
Admission date | dc.date.accessioned | 2009-06-03T17:15:17Z | |
Available date | dc.date.available | 2009-06-03T17:15:17Z | |
Publication date | dc.date.issued | 2006-09-15 | |
Cita de ítem | dc.identifier.citation | SURFACE SCIENCE Volume: 600 Issue: 18 Special Issue: Sp. Iss. SI Pages: 4305-4309 Published: SEP 15 2006 | en |
Identifier | dc.identifier.issn | 0039-6028 | |
Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/118852 | |
Abstract | dc.description.abstract | The monovacancy and the divacancy in single-walled carbon nanotubes (CNTs) are addressed by spin-density functional calculations. We study these defects in four nanotubes, the armchair (6,6) and (8,8) and the zigzag (10, 0) and (14, 0), which have diameters of about 8 and 11 angstrom, respectively. We also consider different defect concentrations along the tube axis. Our results show that CNTs with a monovacancy exhibit ferromagnetism with magnetic moments ranging from 0.3 to 0.8 mu(B). Whereas, CNTs with a divacancy do not exhibit magnetism due to the full reconstruction around the defect where all C atoms are three fold coordinated. We observe that the monovacancy does not change drastically the CNT electronic properties, preserving their corresponding metallic or semiconducting character. However, both armchair and zigzag CNTs with a divacancy become small-gap semiconductors with an energy gap of about 0.15 eV. | en |
Lenguage | dc.language.iso | en | en |
Publisher | dc.publisher | ELSEVIER | en |
Keywords | dc.subject | Carbon nanotubes | en |
Título | dc.title | Structural, electronic and magnetic properties of vacancies in single-walled carbon nanotubes | en |
Document type | dc.type | Artículo de revista |
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