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Dirac electron scattering from a cluster of electrostatically defined quantum dots in graphene

机译:从石墨烯中的静电定义量子点集群散射

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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.
机译:由多粒子MIE理论引导,我们地址石墨烯中的静电定义圆形量子点集群的Dirac电子散射。甚至由两个量子点组成的二聚体呈现丰富的物理:不仅是二聚体的长度,而且其相对于入射电子波矢量的倾斜度影响了散射效率,散射图案,抑制Klein隧道,扇形共振,涡旋模式,和电子密度。没有与入射电子方向对齐的具有无镜对称轴的有限簇表现出不对称的散射图案。由于电荷载体的偏转到有限样本的一侧,可以产生横向电压。我们的研究结果表明,不仅有序而且还可以使用量子点的无序簇来设计天然石墨烯的运输特性。

著录项

  • 来源
    《Physical review》 |2019年第15期|155432.1-155432.10|共10页
  • 作者

    Sadrara Mahdiyeh; Miri MirFaez;

  • 作者单位

    Univ Tehran Dept Phys POB 14395-547 Tehran Iran;

    Univ Tehran Dept Phys POB 14395-547 Tehran Iran;

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  • 正文语种 eng
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