Magnetic response in finite carbon graphene sheets and nanotubes

F. López-Urías; J. A. Rodríguez-Manzo; E. Muñoz-Sandoval; M. Terrones; H. Terrones

doi:10.1016/j.optmat.2006.03.025

Magnetic response in finite carbon graphene sheets and nanotubes

F. López-Urías, J. A. Rodríguez-Manzo, E. Muñoz-Sandoval, M. Terrones, H. Terrones

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

The electronic and magnetic properties of graphene sheets with armchair and zig-zag edges are investigated using the Hückel tight binding model in conjunction with the London approximation. It is observed that in the presence of a perpendicular external magnetic field, the nanographenes show a diamagnetic behavior exhibiting counter-clockwise ring currents. Topological defects such as vacancies, Stone-Wale transformations (bond rotations) and holes are introduced in the graphene sheets in order to enhance local paramagnetic ring currents. These ring currents produce a local magnetic moment perpendicular to the defective site. In addition, current flows in finite carbon nanotubes are investigated.

Original language	English (US)
Pages (from-to)	110-115
Number of pages	6
Journal	Optical Materials
Volume	29
Issue number	1
DOIs	https://doi.org/10.1016/j.optmat.2006.03.025
State	Published - Oct 2006

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering
Spectroscopy
Inorganic Chemistry
Physical and Theoretical Chemistry
Organic Chemistry

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10.1016/j.optmat.2006.03.025

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title = "Magnetic response in finite carbon graphene sheets and nanotubes",

abstract = "The electronic and magnetic properties of graphene sheets with armchair and zig-zag edges are investigated using the H{\"u}ckel tight binding model in conjunction with the London approximation. It is observed that in the presence of a perpendicular external magnetic field, the nanographenes show a diamagnetic behavior exhibiting counter-clockwise ring currents. Topological defects such as vacancies, Stone-Wale transformations (bond rotations) and holes are introduced in the graphene sheets in order to enhance local paramagnetic ring currents. These ring currents produce a local magnetic moment perpendicular to the defective site. In addition, current flows in finite carbon nanotubes are investigated.",

author = "F. L{\'o}pez-Ur{\'i}as and Rodr{\'i}guez-Manzo, {J. A.} and E. Mu{\~n}oz-Sandoval and M. Terrones and H. Terrones",

note = "Funding Information: We thank A. Mart{\'i}nez-Amador, D. Ram{\'i}rez, G. Ram{\'i}rez-Manzanares, and G. P{\'e}rez-Assaf for technical assistance. This work was supported by CONACYT-M{\'e}xico grants: 45762 (HT), 45772 (MT), 41464-Inter American Collaboration (MT), 42428-Inter American Collaboration (HT), 2004-01-013/SALUD-CONACYT (MT), PUE-2004-CO2-9 Fondo Mixto de Puebla (MT) and PhD. Scholarship (JARM). ",

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T1 - Magnetic response in finite carbon graphene sheets and nanotubes

AU - López-Urías, F.

AU - Rodríguez-Manzo, J. A.

AU - Muñoz-Sandoval, E.

AU - Terrones, M.

AU - Terrones, H.

N1 - Funding Information: We thank A. Martínez-Amador, D. Ramírez, G. Ramírez-Manzanares, and G. Pérez-Assaf for technical assistance. This work was supported by CONACYT-México grants: 45762 (HT), 45772 (MT), 41464-Inter American Collaboration (MT), 42428-Inter American Collaboration (HT), 2004-01-013/SALUD-CONACYT (MT), PUE-2004-CO2-9 Fondo Mixto de Puebla (MT) and PhD. Scholarship (JARM).

PY - 2006/10

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N2 - The electronic and magnetic properties of graphene sheets with armchair and zig-zag edges are investigated using the Hückel tight binding model in conjunction with the London approximation. It is observed that in the presence of a perpendicular external magnetic field, the nanographenes show a diamagnetic behavior exhibiting counter-clockwise ring currents. Topological defects such as vacancies, Stone-Wale transformations (bond rotations) and holes are introduced in the graphene sheets in order to enhance local paramagnetic ring currents. These ring currents produce a local magnetic moment perpendicular to the defective site. In addition, current flows in finite carbon nanotubes are investigated.

AB - The electronic and magnetic properties of graphene sheets with armchair and zig-zag edges are investigated using the Hückel tight binding model in conjunction with the London approximation. It is observed that in the presence of a perpendicular external magnetic field, the nanographenes show a diamagnetic behavior exhibiting counter-clockwise ring currents. Topological defects such as vacancies, Stone-Wale transformations (bond rotations) and holes are introduced in the graphene sheets in order to enhance local paramagnetic ring currents. These ring currents produce a local magnetic moment perpendicular to the defective site. In addition, current flows in finite carbon nanotubes are investigated.

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JF - Optical Materials

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Magnetic response in finite carbon graphene sheets and nanotubes

Abstract

All Science Journal Classification (ASJC) codes

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