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 journalArticlepeer-review

17 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 languageEnglish (US)
Pages (from-to)110-115
Number of pages6
JournalOptical Materials
Volume29
Issue number1
DOIs
StatePublished - Oct 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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