Absorption spectra of asymmetric bilayer graphene nanoribbons

T. S. Li, Min-Fa Lin

研究成果: Article同行評審

摘要

The low-frequency optical absorption properties of asymmetric bilayer graphene nanoribbons in an external electric field are investigated by using the gradient approximation. This study shows that the optical absorption spectra exhibit rich prominent peaks structure mainly owing to the one-dimensional subbands. For asymmetric bilayer graphene nanoribbons without the interlayer atomic interactions, there exists an optical selection rule which is caused by the spatial symmetry of the wave functions. Furthermore, such selection rule does not exist with the presence of the interlayer hoppings or an external electric field. In addition, the number, spectral intensity, and energy of the absorption peaks are strongly dependent on the interlayer atomic interactions, the magnitude and direction of the electric field, the relative displacement between the nanoribbons, and the ribbon width. The presented results can be validated by absorption spectroscopy measurements.

原文English
頁(從 - 到)86-93
頁數8
期刊Synthetic Metals
179
DOIs
出版狀態Published - 2013 九月 3

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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