论文标题
通过Helicon-Phonon混合在导电材料中混合的Weyl激发
Weyl excitations via helicon-phonon mixing in conducting materials
论文作者
论文摘要
带有Weyl分散体的准粒子可以显示出丰富的新拓扑，热力学和传输现象，这就是为什么在电子，磁性，光子和声学系统中深入寻找新型的Weyl材料和Weyl物理平台的原因。我们证明，由于声子与Helicons的杂交，在磁场中传导材料，通常托管Weyl激发，集体中性的电子模式与材料中传播的电磁波相互作用。通常，这种Weyl激发是由直升机与纵向声音子的相互作用产生的。极性晶体中另一种类型的Weyl激发来自直升机与纵向光学声子之间的相互作用。可以在X射线和拉曼散射实验中检测到这种激发。大部分材料中涉及光子声子的Weyl激发的存在也导致形成拓扑保护的表面弧态，可以通过表面等离子体的共振来检测。
Quasiparticles with Weyl dispersion can display an abundance of novel topological, thermodynamic and transport phenomena, which is why novel Weyl materials and platforms for Weyl physics are being intensively looked for in electronic, magnetic, photonic and acoustic systems. We demonstrate that conducting materials in magnetic fields generically host Weyl excitations due to the hybridisation of phonons with helicons, collective neutral modes of electrons interacting with electromagnetic waves propagating in the material. Such Weyl excitations are, in general, created by the interactions of helicons with longitudinal acoustic phonons. An additional type of Weyl excitation in polar crystals comes from the interaction between helicons and longitudinal optical phonons. Such excitations can be detected in X-ray and Raman scattering experiments. The existence of the Weyl excitations involving optical phonons in the bulk of the materials also leads to the formation of topologically protected surface arc states that can be detected via surface plasmon resonance.
