Zero chiral bulk modes in 3D Weyl metamaterials

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2019,（12）
• 页码范围: 799-801
• 页数: 3页
• 语种: 英文

摘要

In the Weyl semimetals,a special type of one-way chiral zero mode (CZM) can be supported ira strong magnetic field is applied.The corresponding CZM is related to the zero-order Landau level for relativistic particles in Dirac or Weyl systems.This special energy level can lead to chiral anomaly,which describes the phenomenon of breaking the conservation of chirality [1].Under the action of an effective magnetic field,the zeroth Landau mode can be expected to propagate only in the chiral direction according to the chirality (left-handed or right-handed) of the Weyl points and the magnetic field direction.Distinguished from the topological insulators,such a one-way propagation mode is a bulk state rather than a surface state or edge state that travels along the interface.Recently,the discovery of Dirac or Weyl degeneracies in the electronic and photonic systems brings opportunities for experimental detection of the chiral zeroth Landau levels [2,3].Notwithstanding,the chiral Landau level in the 3D photonic system has not been observed yet.