Magnetoelectronic properties of nanographite ribbons

C. P. Chang, C. L. Lu, F. L. Shyu, R. B. Chen, Y. C. Huang, Min-Fa Lin

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Magnetoelectronic structures of the AA- and AB-stacked nanographite ribbons, which strongly depend on magnitude and direction of magnetic field, ribbon edges, and interribbon interactions, are studied within the frame of tight-binding model. First, the origins of Landau subbands and additional spectra, induced by the perpendicular magnetic field B⊥, chiefly changing the intraribbon interaction, are analytically studied in the zigzag systems. This method allows us to intuitively understand the magnetoband structures of the finite size systems. Then, the interribbon interactions modify Landau subbands and change energy dispersions, energy spacing, bandwidth and oscillation period of Landau subbands. On the other hand, the parallel magnetic field B∥ changes the interribbon interactions and leads to the Landau levels along k̂z. Furthermore, B∥ can induce the metal-insulator transition in the AB-stacked armchair ribbons. Above all, magnetic field and interribbon interactions vitalize the magnetoband structures. So, there are rich structures in density of states: sharp peaks, square-root peaks, logarithmic divergences and oscillating structures. Finally, DOS can clearly exhibit 0D, 1D and 2D characteristics. And this specific is expected to have great effects on the physical properties, e.g. optical, magnetic and transport properties, of the stacked ribbons.

Original languageEnglish
Pages (from-to)82-97
Number of pages16
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume27
Issue number1-2
DOIs
Publication statusPublished - 2005 Mar 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Magnetoelectronic properties of nanographite ribbons'. Together they form a unique fingerprint.

Cite this