Magnetoelectronic properties of nanographite ribbons

C. P. Chang, C. L. Lu, F. L. Shyu, R. B. Chen, Y. C. Huang, M. F. Lin

研究成果: Article同行評審

21 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)82-97
頁數16
期刊Physica E: Low-Dimensional Systems and Nanostructures
27
發行號1-2
DOIs
出版狀態Published - 2005 三月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 原子與分子物理與光學
  • 凝聚態物理學

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