论文标题
在封装的磷烯中等离子体 - 音出 - 果龙
Plasmon-phonon-polaritons in encapsulated phosphorene
论文作者
论文摘要
我们认为一个系统由一个掺杂的单层磷酸烯组成，该磷嵌入了两个六角形硝化硼（HBN）沿异质结构方向的平板。基于有限温度下的随机相位近似，计算了混合系统的等离子 - 孔子和等离子体 - 波利顿模式的波形方位角方位角依赖性。集体模式说明了强烈的各向异性和与极性介质的声子模式以及强烈的耦合，此外，当等离子体进入内映的电子孔连续体时，发生了降落阻尼。我们的数值结果表明，等离子体模式高度局限于沿锯齿形方向的表面。由于强烈的电子相互作用，静息条带中的声子分散也与角度有关。这些结果也与我们计算中获得的半经典模型的结果一致。
We consider a system consists of a doped monolayer phosphorene embedded between two hexagonal Boron Nitride (hBN) slabs along the heterostructure direction. The wavevector azimuthal angle dependence of the plasmon-polariton and plasmon-phonon-polariton modes of the hybrid system are calculated based on the random phase approximation at finite temperature. The collective modes illustrate strong anisotropy and strong coupling with phonon modes of the polar media and furthermore, the Landau damping occurs due to the intraband processes when plasmon enters intraband electron-hole continuum. Our numerical results show that the plasmon mode is highly confined to the surface along the zigzag direction. Owing to the strong electron-phonon interaction, the phonon dispersions in the Reststrahlen bands are also angle-dependent. These results are also in agreement with those of the semiclassical model obtained in our calculations.
