论文标题
紧张的蜂窝结构中由不均匀的费米速度引起的有效磁场
Effective magnetic field induced by inhomogeneous Fermi velocity in strained honeycomb structures
论文作者
论文摘要
除了已知的假磁场外，非均匀菌株独立诱导了石墨烯中的位置依赖性费米速度（PDFV）。在这里，我们证明，由于存在PDFV，在不均匀（紧张的）蜂窝状晶格上的Dirac Fermions可能会试验一种磁效应，该磁效应与准粒子的动量成正比。结果，准粒子具有透明性分散关系。此外，我们分析了PDFV对电子通过假磁性屏障的klein隧穿的总体结果。特别是，我们报告了一条异常的（klein）隧道，用于通过具有磁性特征的速度屏障的电子。我们关于PDFV对（2D）紧张的蜂窝晶格中Dirac Fermions引起的影响的发现，可以扩展到（3D）DIRAC和WEYL SEMIMETALS和/或其类似的人工系统。
In addition to the known pseudomagnetic field, nonuniform strains independently induce a position-dependent Fermi velocity (PDFV) in graphene. Here we demonstrate that, due to the presence of a PDFV, the Dirac fermions on a nonuniform (strained) honeycomb lattice may experiment a sort of magnetic effect, which is linearly proportional to the momentum of the quasiparticle. As a consequence, the quasiparticles have a sublinear dispersion relation. Moreover, we analyze the general consequence of a PDFV on the Klein tunneling of electrons through pseudomagnetic barriers. In particular, we report an anomalous (Klein) tunneling for an electron passing across velocity barriers with magnetic features. Our findings about the effects induced by a PDFV on Dirac fermions in (2D) strained honeycomb lattice could be extended to (3D) Dirac and Weyl semimetals and/or its analogous artificial systems.
