• 文献标题:   Quantum capacitance of the armchair-edge graphene nanoribbon
  • 文献类型:   Article
  • 作  者:   MAO LF
  • 作者关键词:   graphene electronic, finitesize effect, capacitance, quantization
  • 出版物名称:   PRAMANAJOURNAL OF PHYSICS
  • ISSN:   0304-4289 EI 0973-7111
  • 通讯作者地址:   Soochow Univ
  • 被引频次:   5
  • DOI:   10.1007/s12043-013-0556-x
  • 出版年:   2013

▎ 摘  要

The quantum capacitance, an important parameter in the design of nanoscale devices, is derived for armchair-edge single-layer graphene nanoribbon with semiconducting property. The quantum capacitance oscillations are found and these capacitance oscillations originate from the lateral quantum confinement in graphene nanoribbon. Detailed studies of the capacitance oscillations demonstrate that the local channel electrostatic potential at the capacitance peak, the height and the number of the capacitance peak strongly depend on the width, especially a few nanometres, of the armchair-edge graphene nanoribbon. It implies that the capacitance oscillations observed in the experiments can be utilized to measure the width of graphene nanoribbon. The results also show that the capacitance oscillations are not seen when the width is larger than 30 nm.