• 文献标题:   Electron and spin transport in adiabatic quantum pumps based on graphene nanoribbons
  • 文献类型:   Article
  • 作  者:   GRICHUK ES, MANYKIN EA
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF EXPERIMENTAL THEORETICAL PHYSICS
  • ISSN:   1063-7761 EI 1090-6509
  • 通讯作者地址:   Natl Res Nucl Univ
  • 被引频次:   0
  • DOI:   10.1134/S1063776111140159
  • 出版年:   2011

▎ 摘  要

The adiabatic quantum pump effect in double-barrier structures based on graphene nanoribbons has been analyzed numerically. The charge transmitted through the system in one cycle of variation of pumping potentials (barrier heights) has been calculated. This charge is shown to be quantized under certain conditions. The possibility of the generation of not only electron currents but also spin and purely spin ones is considered. In devices based on zigzag nanoribbons, the spin current emerges when taking into account their magnetic structure and applying a transverse electric field breaking the symmetry between the up and down spins. In devices based on armchair nanoribbons without any magnetic structure, this symmetry breaks when using a ferromagnetic insulator (deposited, for example, on the region between gates) through the proximity effect.