• 文献标题:   Negative Differential Resistance in Graphene Boron Nitride Heterostructure Controlled by Twist and Phonon-Scattering
  • 文献类型:   Article
  • 作  者:   ZHAO YQ, WAN ZN, HETMANUIK U, ANANTRAM MP
  • 作者关键词:   graphene heterostructure, green s function, negative differential resistance, phonon scattering
  • 出版物名称:   IEEE ELECTRON DEVICE LETTERS
  • ISSN:   0741-3106 EI 1558-0563
  • 通讯作者地址:   Univ Washington
  • 被引频次:   2
  • DOI:   10.1109/LED.2016.2595522
  • 出版年:   2016

▎ 摘  要

The distinct negative differential resistance (NDR) mechanism arising from interlayer angular rotation in three-terminal graphene-BN heterostructures, as a function of both the twisting angle and the gate bias, is simulated and analyzed. Analytical expressions for the positions of the NDR peaks in the I-V characteristics are developed. To capture the degradation of peak-to-valley ratios observed in experiment at room temperature, electron-phonon scattering has been added to the simulation and good agreement with experiment is achieved. Our simulation also shows a robust preservation of NDR feature when temperature increases.