• 文献标题:   Dirac electron scattering from a cluster of electrostatically defined quantum dots in graphene
  • 文献类型:   Article
  • 作  者:   SADRARA M, MIRI M
  • 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 Tehran
  • 被引频次:   0
  • DOI:   10.1103/PhysRevB.99.155432
  • 出版年:   2019

▎ 摘  要

Guided by the multiparticle Mie theory, we address Dirac electron scattering from a cluster of electrostatically defined circular quantum dots in graphene. Even a dimer composed of two quantum dots exhibits rich physics: Not only the length of the dimer but also its inclination with respect to the incident electron wave vector affect the scattering efficiency, scattering pattern, suppression of Klein tunneling, Fano resonances, vortex pattern, and electron density. A finite cluster with no axis of mirror symmetry aligned with the direction of incident electron exhibits an asymmetric scattering pattern. As a result of deflection of charge carriers to one side of a finite sample, a transverse voltage may be generated. Our results suggest that not only ordered but also disordered clusters of quantum dots can be used to engineer the transport properties of the native graphene.