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Nonlocal Coulomb drag in Weyl semimetals

机译:Weyl半金属中的非局部库仑阻力

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摘要

Nonlocality is one of the most striking signatures of the topological nature of Weyl semimetals. We propose to probe the nonlocality in these materials via a measurement of a magnetic-field-dependent Coulomb drag between two sheets of graphene which are separated by a three-dimensional slab of Weyl semimetal. We predict a mechanism of Coulomb drag, based on cyclotron orbits that are split between opposite surfaces of the semimetal. In the absence of impurity scattering between different Weyl nodes, this mechanism does not decay with the thickness of the semimetal.
机译:非局部性是Weyl半金属拓扑性质最显着的特征之一。我们建议通过测量两片石墨烯之间的磁场相关库仑阻力来测量这些材料中的非局部性,这两片石墨烯由Weyl半金属的三维平板分开。我们基于在半金属的相对表面之间分裂的回旋加速器轨道,预测了库仑阻力的机制。在不同的Weyl节点之间没有杂质散射的情况下,该机制不会随半金属的厚度而衰减。

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  • 来源
    《Physical review》 |2017年第7期|075141.1-075141.8|共8页
  • 作者

    Yuval Baum; Ady Stern;

  • 作者单位

    Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel,Institute of Quantum Information and Matter, Department of Physics, California Institute of Technology, Pasadena,California 91125, USA;

    Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel;

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