多原子极性晶体中声子极化激元的广义黄方程
Generalized Huang's Equation for Phonon Polariton in Polyatomic Polar Crystal
AI总结:
本文提出不含拟合参数的广义黄方程,将声子极化激元理论从双原子晶体推广到多原子极性晶体,并成功获得多种体材料和二维材料的色散关系及本征态,发现hBN薄片中离子振动分量具有非零圆偏振。
摘要:
声子极化激元的原始理论是黄方程,该方程仅适用于双原子极性晶体。我们提出了一个不含拟合参数、适用于多原子极性晶体中声子极化激元的广义黄方程。我们获得了GaP(体材料)、hBN(体材料和二维)、α-MoO3(体材料和二维)以及ZnTeMoO6(二维)中声子极化激元的色散关系,这些结果与文献中及我们自己的实验结果一致。我们还获得了声子极化激元的本征态。我们发现,在hBN薄片中,这些本征态的离子振动分量的圆偏振不为零。该结果与hBN中声子的结果不同。
英文摘要:
The original theory of phonon polariton is Huang's equation which is suitable for diatomic polar crystals only. We proposed a generalized Huang's equation without fitting parameters for phonon polariton in polyatomic polar crystals. We obtained the dispersions of phonon polariton in GaP (bulk), hBN (bulk and 2D), α-MoO3 (bulk and 2D) and ZnTeMoO6 (2D), which agree with the experimental results in the literature and of ourselves. We also obtained the eigenstates of the phonon polariton. We found that the circular polarization of the ion vibration component of these eigenstates is nonzero in hBN flakes. The result is different from that of the phonon in hBN.
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