• 文献标题:   Resonance Transmission in Graphene-Nanoribbon-Based Quantum Dot and Superlattice
  • 文献类型:   Article
  • 作  者:   XU N, WANG BL, SUN HQ, DING JW
  • 作者关键词:  
  • 出版物名称:   CHINESE PHYSICS LETTERS
  • ISSN:   0256-307X
  • 通讯作者地址:   Yancheng Inst Technol
  • 被引频次:   2
  • DOI:   10.1088/0256-307X/27/10/107303
  • 出版年:   2010

▎ 摘  要

By using a decomposition elimination method for Green's function, the transport properties of Graphene-nanoribbon-based quantum dot (QD) and/or QD superlattice are studied. It is shown that relatively small changes of both QD size and magnetic field intensity can induce strong variations in the electron transmission across the structure. For a QD device, electrons can be either totally reflected or totally transmitted through the QD region at some energies, and the quasibound peaks have been observed to have a small shift due to quasibound state energy varying. In the case of QD superlattice, the electrons within the miniband energy region can transmit through a device, similar to a QD device. Therefore, the transmission spectrum can be tailored to match with requirement by modulating the size of quantum dot and the number.. of superlattce.