• 文献标题:   Electronic structure and quantum transport in twisted bilayer graphene with resonant scatterers
  • 文献类型:   Article
  • 作  者:   NAMARVAR OF, MISSAOUI A, MAGAUD L, MAYOU D, DE LAISSARDIERE GT
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Univ Grenoble Alpes
  • 被引频次:   1
  • DOI:   10.1103/PhysRevB.101.245407
  • 出版年:   2020

▎ 摘  要

Stacking layered materials revealed to be a very powerful method to tailor their electronic properties. It has indeed been theoretically and experimentally shown that twisted bilayers of graphene (tBLG) with a rotation angle theta, forming a Moire pattern, confine electrons in a tunable way as a function of theta. Here, we study electronic structure and transport in tBLG using tight-binding numerical calculations in commensurate twisted bilayer structures and a pertubative continuous theory, which is valid for not-too-small angles (theta >similar to 2 degrees). These two approaches allow us to understand the effect of theta on the local density of states, the electron lifetime due to disorder, the DC conductivity, and the conductivity quantum correction due to multiple scattering effects. We distinguish the cases where disorder is equally distributed over two layers or only one layer. When only one layer is disordered, diffusion properties depend strongly on 0, thus showing the effect of Moire electronic localization at intermediate angles theta, similar to 2 degrees < theta