Chiral Berry plasmon dispersion of the two-dimensional electron gas based on a quantum hydrodynamic model
Chiral Berry plasmon dispersion of the two-dimensional electron gas based on a quantum hydrodynamic model
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DOI：
10.1063/5.0097873
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发表时间：
2022-08
影响因子：
2.2
通讯作者：
Bao-Kai Wang;Bin Guo
中科院分区：
文献类型：
--
作者：
Bao-Kai Wang;Bin Guo
利用量子流体力学模型研究了高密度二维电子气(2DEG)薄膜覆盖在半无限大介质衬底上的手征Berry等离子体(CBPS)的性质。通过耦合麦克斯韦方程、泊松方程和边界条件，我们详细地推导了具有非零Berry通量的等离子体激元的色散关系。给出了考虑量子效应的CBPS色散与经典模型色散的差异。我们展示了量子效应、Berry曲率、衬底的介电常数和二维电子气中的电子密度如何影响CBPS的行为。计算并讨论了影响的参数依赖性。
We employ the quantum hydrodynamic model to investigate the properties of chiral Berry plasmons (CBPs) generated by a high-density two-dimensional electron gas (2DEG) film covering a semi-infinite dielectric substrate with a finite Berry flux. By coupling Maxwell's equations, Poisson's equation, and the boundary conditions, we derive the dispersion relations of plasmon with a nonzero Berry flux in detail. We present the difference in the dispersion of CBPs with quantum effects and the classical model. We show how the quantum effect, Berry curvature, the dielectric constant of the substrate, and electron density in 2DEG affect the behavior of the CBPs. Parameter dependence of the effects is calculated and discussed.